Research 7

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Running Head: EFFECTS OF POLLUTION ON EMPLOYEES 1

EFFECTS OF POLLUTION ON EMPLOYEES 12

Effects of Pollution on Employees’ Health (case study Sun Coast Company)

Miguel Figueroa

January 7th, 2020

Columbia Southern University 11

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Columbia Southern University

Table of Contents

Abstract. .. .. .. .. .. .. .. .. .. .. .. .. .. . ..3

Introduction. .. .. .. .. .. .. .. .. .. .. .. .. .. .4

Statement of the Problem. .. .. .. .. .. .. .. .. .. .. . .4

Literature Review. .. .. .. .. .. .. .. .. .. .. .. .. .6

Research objectives. .. .. .. .. .. .. .. .. .. .. .. . ..7

Research questions and hypothesis. .. .. .. .. .. .. .. .. . ...7

Research Methodology, Design, and Method. .. .. .. .. .. .. .. 8

Data Analysis: Descriptive Statistics and Assumption Testing. .. .. .. . .9

Data Analysis: Hypothesis testing. .. .. .. .. .. .. .. .. .. ...9

Findings. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9

Recommendations. .. .. .. .. .. .. .. .. .. .. .. .. . 11

References. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 12

Abstract

This study aims to figure out the safety of employees working in the Sun Coast company. It aims at analyzing the risks that pollution poses on em- ployees. This will include particulate matter pollution, noise pollution, and lead poisoning. It will also analyze the effectiveness of training given to employees in reducing the risks of pollution. This will involve safety training and new employee training. The training will also look at the re-

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turn on investment on all the services provided by the company. The

ethnographic study will be applied in this study.

Introduction

Senior leadership at Sun Coast has identified several areas for concern that they believe can be solved using business research methods. The previous director was tasked with researching to help provide information to make decisions about these issues. Although data were collected, the project was never completed. Senior leadership is interested in seeing the project through to fruition. The following is the completion of that project and includes the statement of the problems, literature review, re- search objectives, research questions and hypotheses, research method- ology, design and methods, data analysis, findings, and recommenda-

tions. Statement of the problem

Six problems were identified: Particulate matter (PM) There is a con- cern that job-site particle pollution is adversely impacting employee health. Although respirators are required in certain environments, PM varies in size depending on the project and the job site. PM that is be- tween 10 and 2.5 microns can float in the air for minutes to hours (eg, as- bestos, mold spores, pollen, cement dust, ash fly), while PM that is less than 2.5 microns can float in the air for hours to weeks (eg, bacteria, virus- es, oil smoke, smog, soot). Due to the smaller size of a PM that is less than 2.5 microns, it is potentially more harmful than PM that is between 10 and 2.5 microns since the conditions are more suitable for inhalation. A PM that is less than 2.5 is also able to be inhaled into the deeper regions of the lungs, potentially causing more deleterious health effects. It would be helpful to understand if there is a relationship between PM size and employee health. PM air quality data have been collected from 103 job sites, which is recorded in microns. Data are also available for average an-

nual sick days per employee per job site. Safety training effectiveness

Health and safety training is conducted for each new contract that is

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Health and safety training is conducted for each new contract that is awarded to the Sun Coast. Data for training expenditure and lost time hours were collected from 223 contracts. It would be valuable to know if training has been successful in reducing lost time hours and, if so, how to predict lost time hours from training expenditures. Sound-Level expo-

sure

Sun Coast's contracts generally involve working in noisy environments due to a variety of heavy equipment being used for both remediation and client's ongoing operations on the job sites. Standard ear-plug is ade- quate to protect employee hearing if the decibel levels are less than 120 decibels (dB). For environments with noise levels exceeding 120 deci- bels, more advanced and expensive hearing protection is required, such as earmuffs. Historical data have been collected from 1,503 contracts for several variables that are believed to contribute to excessive dB levels. It would be important if these could be used to predict the dB levels of work environments before placing employees’ on-sites for further contracts. This would help the safety department plan for the procurement of ear

protection for employees. New Employee Training

All sun Coast employees participate in general health and safety training. The training program was revamped and implemented six months ago. Upon completion of the training programs, the employees are tested

on their knowledge. Test data are available for two groups: Group A em- ployees who participate in the prior program and Group B employees who participate in the revised training program. It is necessary to know if the revised program is more effective than the prior training program. Lead

Exposure

Employees working on job sites to remediate lead must be monitored. Lead levels in the blood are measured in micrograms of lead per

deciliter of blood (ug/dL).

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A baseline blood test is taken pre-exposure and post-exposure after the remediation. Data are available for 49 employees who recently conclud- ed a 2-year lead remediation project. It is necessary to determine if

blood lead levels have increased. Return on Investment

Sun Coast offers four lines of service to its customers including air monitoring, soil remediation, water reclamation, and health and safety training. Sun Coast would like to know if each line of service offers the same return on investment. Return on investment data is available on air monitoring, soil remediation, water reclamation, and health and safety training projects. If the return on investment is not the same for all lines of service, it would be helpful to know where differences exist. Litera-

ture Review

Pollution at job sites has had several effects on the employees' health. From the particulate matter pollution, to sound level pollution and lead exposure pollution. Employees have suffered various effects of these pol- lutions ranging from internal organs infections to hearing problems (Wachter and Yorio, 2014). These effects range from mild to severe. This research, therefore, aims at analyzing these pollutions and the effects as- sociated with each. It also aims at analyzing the effectiveness of safety training and new employee training in preventing or reducing the effects of pollution. This study also reviewed the return on investment on all the lines of service provided by the company. Research objectives · To es- tablish the relationship between PM size and employee health. · To es- tablish if training has been successful in reducing lost time hours and, if so, how to predict lost time hours from training expenditures. · To es- tablish the dB levels of work environments. · To establish if the revised program is more effective than the prior training program in new employ- ee training. · To determine if blood lead levels have increased in em- ployees after a 2- year lead remediation project. · To establish the re- turn on investment is not the same for all lines of service. Research

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turn on investment is not the same for all lines of service. Research

questions and hypothesis

RQ1: What is the relationship between PM size and employee health? H01: There is no significant relationship between PM size and employee health. HA1: The smaller the PM size, the more dangerous it is to em- ployee health. RQ2: Has training has been successful in reducing lost time hours? H02: Training has not been successful in reducing lost time hours. HA2: Training has been effective in reducing lost time hours. RQ3: What are the dB levels of work environments? H03: There is no significant risk of sound level exposure in the sites. HA3: There is a signifi- cant risk of sound level exposure in the sites. RQ4: Is the revised pro- gram more effective than the prior training program in new employee training? H04: The prior training program is more effective than the re- vised program. HA4: The prior training program is less effective than the revised program. RQ5: Have blood lead levels increased in employ- ees after a 2- year lead remediation project? H05: Blood lead levels have not increased in employees after a 2-year lead remediation project. HA5: Blood lead levels have increased in employees after a 2-year lead remediation project. RQ6: Is the return on investment the same for all lines of service? H06: The return on investment is the same for all lines of service. HA6: The return on investment is not the same for all lines of

service. Research Methodology, Design, and Method

This section comprises the methods of data collection that were involved in the course of this study. The sampling methods and the sampling pro- cedures, the research design among other tools that were used in the study (Kumar, 2019). An ethnographic study was used in this research. This is because it enables one to observe, understand and then respond to a given problem ( Jorgensen, 2015). The research design that was used in this project was a descriptive case study. This involves deeply ana- lyzing a specific company, in this case, Sun Coast. This study applied the surveys and experiments research methods. Data collection methods that were used in this study include case study, direct observation, and sur-

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were used in this study include case study, direct observation, and sur- veys. Simple random sampling was used. The exploratory data analysis

procedure was applied in the data analysis process.

Data Analysis: Descriptive Statistics and Assumption Testing

In this section, the study aimed at testing the assumptions that came up in the course of the study (Chambers, 2017). The first assumption in this study was that there was a connection between PM and employees' health. Air quality data was therefore collected from 103 sites to help de- termine the connection between PM and employees' health. This study also aimed at determining the effect of the sound level in working envi- ronments. 1,503 contracts were analyzed concerning this. This was aimed at enabling the prediction of how safe these sites are. There was also the need to analyze the effectiveness of safety training and whether the ex- penditure in this regard was worthwhile.

In this respect, 223 contracts were analyzed. In analyzing the effectiveness of new employee training, 2 different groups were exposed to different pieces of training to determine which one was more effective. Data Analy-

sis: Hypothesis testing

This involved the testing of both hypotheses using the data collected to determine which one between the null and the alternative hypothesis was true (Chambers, 2017). In most cases, the stated alternative hypothesis turned out to be true. There is indeed a relationship between the PM and employees' health. Safety training has been effective in reducing lost time hours. There is a significant risk of sound level exposure in sites. The revised program in new employee training is more effective than the prior training program. There is a difference in the return on invest- ment on all the lines of service. Finally, there is evidence of blood lead lev-

el increasing in employees after a 2-year remediation project. Findings

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el increasing in employees after a 2-year remediation project. Findings

In the course of the study and after testing the entire hypothesis and ana- lyzing all the data, the following were the findings of the research: O1: To establish the relationship between PM size and employee health. There is a connection between the size of PM and its effect on employees' health (Kim, Kabir and Kabir, 2015). The smaller the PM size, the more the effect it has. This is because the smaller it is, the longer it can stay in the air and the easier it is to diffuse into the system. O2: To establish if training has been successful in reducing lost time hours and, if so, how to predict lost time hours from training expenditures. Safety training has been quite effective in reducing lost time hours. This is because after employees are trained on safety measures, they can take precautions that enable them to prevent most of the risks. This ensures that they do not stay away from work in the name of sick leaves and such. O3: To establish the dB levels of work environments. Most of the work environments were found to be having toxic sound levels that could cause hearing problems to the em- ployees. These sound levels were so high that the risk of hearing impair- ment also was found to be very high. O4: To establish if the revised pro- gram is more effective than the prior training program in new employee training. The revised program was found to be more effective in a new employee training program than the prior training (Wachter and Yorio, 2014). This is because, in the revised program, employees are taught about something that they are already conversant with and therefore it becomes easier to understand. O5: To determine if blood lead levels have increased in employees after a 2- year lead remediation project. Blood lead level was found to have increased in employees upon comple- tion of a 2-year lead remediation period (Kim et al, 2015). This proves that indeed lead poisoning is an issue of concern. Measures should be taken to reduce this risk. O6: To establish if the return on investment is the same for all lines of service. The return on investment is not the same for all lines of services. This was mainly because of the difference in mate- rials used and the different costs in offering the services. Recommenda-

tions

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Source MatchesSource Matches ( (7777))

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tions

The company should invest more in ensuring the safety of employees. Measures should be taken to ensure the reduction of PM in the air (Wachter and Yorio, 2014). Noise reduction should also be put into consid- eration, not forgetting measures to reduce lead poisoning. Employee training has proved to be effective and plays a great part in safety and

therefore the company should invest more in these pieces of training.

References

Chambers, J. M. (2017). Graphical methods for data analysis: 0. Chapman and Hall/CRC. Jorgensen, D. L. (2015). Participant observation. Emerging trends in the social and behavioral sciences: An interdisciplinary, search- able, and linkable resource, 1-15. Kim, K. H., Kabir, E., & Kabir, S. (2015).

A review on the human health impact of airborne particulate matter. Environment international, 74, 136-143. Kim, H. C., Jang, T. W., Chae, H. J., Choi, W. J., Ha, M. N., Ye, B. J.,... & Hong, Y. S. (2015). Evaluation and man- agement of lead exposure. Annals of occupational and environmental medicine, 27(1), 30. Kumar, R. (2019). Research methodology: A step-by- step guide for beginners. Sage Publications Limited. Wachter, J. K., & Yorio, P. L. (2014). A system of safety management practices and worker engagement for reducing and preventing accidents: An empirical and the- oretical investigation. Accident Analysis & Prevention, 68, 117-130.

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Student paper Columbia Southern University

Original source Columbia Southern University

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Student paper Table of Contents

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Student paper Statement of the Problem.

Original source Statement of Problem

Student paper Research questions and hypothesis.

Original source Research Questions and Hypothesis

Student paper Research Methodology, Design, and Method.

Original source Research Methodology, Design, and Method

Student paper Descriptive Statistics and Assumption Testing.

Original source

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Original source Descriptive Statistics and Assumption Testing

Student paper This will involve safety training and new employee training.

Original source Safety Training Effectiveness and New Employee Training

Student paper Senior leadership at Sun Coast has identified several areas for concern that they believe can be solved using business research methods.

Original source Senior leadership at Sun Coast has identified several areas for concern that they believe could be solved us- ing business research methods

Student paper The previous director was tasked with researching to help provide informa- tion to make decisions about these issues. Although data were collected, the project was never completed. Se- nior leadership is interested in seeing the project through to fruition.

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the project through to fruition.

Original source The previous director was tasked with conducting research to help provide information to make decisions about these issues Although data were col- lected, the project was never com- pleted Senior leadership is interested in seeing the project through to fruition

Student paper The following is the completion of that project and includes the state- ment of the problems, literature re- view, research objectives, research questions and hypotheses, research methodology, design and methods, data analysis, findings, and recommendations.

Original source The following is the completion of that project and includes the state- ment of the problems, literature re- view, research objectives, research questions and hypotheses, research methodology, design, and methods, data analysis, findings, and recommendations

Student paper Statement of the problem

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Statement of the problem

Original source Statement of Problem

Student paper Six problems were identified:

Original source Six identified problems

Student paper Particulate matter (PM) There is a concern that job-site particle pollu- tion is adversely impacting employee health.

Original source Particulate Matter (PM) There is a concern that job-site particle pollu- tion is adversely impacting employee health

Student paper Although respirators are required in certain environments, PM varies in size depending on the project and the job site. PM that is between 10 and 2.5 microns can float in the air for minutes to hours (eg, asbestos, mold spores, pollen, cement dust, ash fly), while PM that is less than 2.5 microns can float in the air for hours

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microns can float in the air for hours to weeks (eg, bacteria, viruses, oil smoke, smog, soot). Due to the small- er size of a PM that is less than 2.5 microns, it is potentially more harm- ful than PM that is between 10 and 2.5 microns since the conditions are more suitable for inhalation. A PM that is less than 2.5 is also able to be inhaled into the deeper regions of the lungs, potentially causing more deleterious health effects.

Original source Although respirators are required in certain environments, PM varies in size depending on the project and job site PM that is between 10 and 2.5 microns can float in the air for min- utes to hours (eg, asbestos, mold spores, pollen, cement dust, fly ash), while PM that is less than 2.5 microns can float in the air for hours to weeks (eg bacteria, viruses, oil smoke, smog, soot) Due to the smaller size of PM that is less than 2.5 microns, it is po- tentially more harmful than PM that is between 10 and 2.5 since the con- ditions are more suitable for inhala- tion PM that is less than 2.5 is also able to be inhaled into the deeper re- gions of the lungs, potentially causing more deleterious health effects

Student paper

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Student paper It would be helpful to understand if there is a relationship between PM size and employee health.

Original source It would be helpful to understand if there is a relationship between PM size and employee health

Student paper PM air quality data have been collect- ed from 103 job sites, which is recorded in microns. Data are also available for average annual sick days per employee per job site. Safety training effectiveness Health and safety training is conducted for each new contract that is awarded to the Sun Coast.

Original source PM air quality data have been collect- ed from 103 job sites, which is recorded in microns Data are also available for average annual sick days per employee per job-site Safety Training Effectiveness Health and safety training is conducted for each new contract that is awarded to Sun Coast

Student paper Data for training expenditure and lost

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Student paper 92%

time hours were collected from 223 contracts. It would be valuable to know if training has been successful in reducing lost time hours and, if so, how to predict lost time hours from training expenditures.

Original source Data for training expenditures and lost-time hours were collected from 223 contracts It would be valuable to know if training has been successful in reducing lost-time hours and, if so, how to predict lost-time hours from training expenditures

Student paper Sound-Level exposure

Original source Sound-Level Exposure

Student paper Sun Coast's contracts generally in- volve working in noisy environments due to a variety of heavy equipment being used for both remediation and client's ongoing operations on the job sites.

Original source Sun Coast’s contracts generally in- volve work in noisy environments due to a variety of heavy equipment

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due to a variety of heavy equipment being used for both remediation and the clients’ ongoing operations on the job sites

Student paper Standard ear-plug is adequate to pro- tect employee hearing if the decibel levels are less than 120 decibels (dB).

Original source Standard ear-plugs are adequate to protect employee hearing if the deci- bel levels are less than 120 decibels (dB)

Student paper For environments with noise levels exceeding 120 decibels, more ad- vanced and expensive hearing pro- tection is required, such as earmuffs. Historical data have been collected from 1,503 contracts for several vari- ables that are believed to contribute to excessive dB levels. It would be im- portant if these could be used to pre- dict the dB levels of work environ- ments before placing employees’ on- sites for further contracts. This would help the safety department plan for the procurement of ear protection for employees.

Original source

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Student paper 98%

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Original source For environments with noise levels exceeding 120 dB, more advanced and expensive hearing protection is required, such as earmuffs Historical data have been collected from 1,503 contracts for several variables that are believed to contribute to exces- sive dB levels It would be important if these data could be used to predict the dB levels of work environments before placing employees on-site for future contracts This would help the safety department plan for procure- ment of appropriate ear protection for employees

Student paper New Employee Training All sun Coast employees participate in general health and safety training.

Original source New Employee Training All new Sun Coast employees participate in gener- al health and safety training

Student paper The training program was revamped and implemented six months ago.

Original source The training program was revamped and implemented six months ago

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and implemented six months ago

Student paper Upon completion of the training pro- grams, the employees are tested on their knowledge. Test data are avail- able for two groups: Group A employ- ees who participate in the prior pro- gram and Group B employees who participate in the revised training program.

Original source Upon completion of the training pro- grams, the employees are tested on their knowledge Test data are avail- able for two groups Group A employ- ees who participated in the prior training program and Group B em- ployees who participated in the re- vised training program

Student paper It is necessary to know if the revised program is more effective than the prior training program.

Original source It is necessary to know if the revised training program is more effective than the prior training program

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Student paper Employees working on job sites to re- mediate lead must be monitored.

Original source Employees working on job sites to re- mediate lead must be monitored

Student paper Lead levels in the blood are mea- sured in micrograms of lead per deciliter of blood (ug/dL).

Original source Lead levels in blood are measured as micrograms of lead per deciliter of blood (μg/dL)

Student paper A baseline blood test is taken pre-ex- posure and post-exposure after the remediation.

Original source A baseline blood test is taken pre-ex- posure and post-exposure at the con- clusion of the remediation

Student paper Data are available for 49 employees who recently concluded a 2-year lead remediation project.

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Original source Data are available for 49 employees who recently concluded a 2-year lead remediation project

Student paper It is necessary to determine if blood lead levels have increased.

Original source It is necessary to determine if blood lead levels have increased

Student paper Return on Investment

Original source Return on Investment

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Student paper Sun Coast offers four lines of ser- vice to its customers including air monitoring, soil remediation, water reclamation, and health and safety training.

Original source Sun Coast offers four lines of ser- vice to its customers, including air monitoring, soil remediation, water reclamation, and health and safety training

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training

Student paper Sun Coast would like to know if each line of service offers the same return on investment.

Original source Sun Coast would like to know if each line of service offers the same return on investment

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Student paper Return on investment data is avail- able on air monitoring, soil remedi- ation, water reclamation, and health and safety training projects.

Original source Return on investment data is avail- able for air monitoring, soil remedi- ation, water reclamation, and health and safety training projects

Student paper If the return on investment is not the same for all lines of service, it would be helpful to know where differences exist.

Original source If return on investment is not the same for all lines of service, it would

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same for all lines of service, it would be helpful to know where differences exist

Student paper Research objectives · To establish the relationship between PM size and employee health.

Original source Is there a relationship between the PM size and employee health

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Student paper · To establish if training has been successful in reducing lost time hours and, if so, how to predict lost time hours from training expenditures.

Original source To determine if training has been successful in reducing lost-time hours and, if so, how to predict lost- time hours from training expenditures

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Student paper · To establish the dB levels of work environments.

Original source To predict the decibel (dB) levels of

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To predict the decibel (dB) levels of future work environments

Student paper · To establish if the revised program is more effective than the prior training program in new employee training.

Original source Is the revised new employee training program more effective than the pri- or new employee training program

1 2

Student paper · To determine if blood lead levels have increased in employees after a 2- year lead remediation project.

Original source To verify if blood lead levels have increased during the 2-year lead re- mediation project

Student paper · To establish the return on invest- ment is not the same for all lines of service.

Original source The return on investment is different for all lines of service

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Student paper Research questions and hypothesis

Original source Research Questions and Hypothesis

Student paper What is the relationship between PM size and employee health?

Original source Is there a relationship between the PM size and employee health

Student paper There is no significant relationship between PM size and employee health.

Original source There is no statistically significant re- lationship between PM size and em- ployee health

Student paper The smaller the PM size, the more dangerous it is to employee health.

Original source The larger the PM size is more detri- mental to employee health

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Student paper Has training has been successful in reducing lost time hours?

Original source The training was successful in re- ducing lost-time hours

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Student paper Training has not been successful in reducing lost time hours.

Original source The training was not successful in reducing lost-time hours

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Student paper Training has been effective in re- ducing lost time hours.

Original source Has training has been effective in reducing the amount of lost time in hours

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Student paper What are the dB levels of work environments?

Original source To predict the decibel (dB) levels of

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To predict the decibel (dB) levels of future work environments

Student paper Is the revised program more effective than the prior training program in new employee training?

Original source Is the revised new employee training program more effective than the pri- or new employee training program

Student paper The prior training program is more effective than the revised program.

Original source The revised training program is more effective than the prior training program

Student paper The prior training program is less ef- fective than the revised program.

Original source The revised training program is more effective than the prior training program

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2 Student paper Have blood lead levels increased in employees after a 2- year lead re- mediation project?

Original source To verify if blood lead levels have increased during the 2-year lead re- mediation project

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Student paper Blood lead levels have not in- creased in employees after a 2-year lead remediation project.

Original source To verify if blood lead levels have increased during the 2-year lead re- mediation project

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Student paper Blood lead levels have increased in employees after a 2-year lead re- mediation project.

Original source To verify if blood lead levels have increased during the 2-year lead re- mediation project

Student paper Is the return on investment the same

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for all lines of service?

Original source The return on investment is different for all lines of service

Student paper The return on investment is the same for all lines of service.

Original source The return on investment is different for all lines of service

Student paper The return on investment is not the same for all lines of service. Research Methodology, Design, and Method

Original source The return on investment is different for all lines of service Research Methodology, Design, and Method

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Student paper The research design that was used in this project was a descriptive case study.

Original source Descriptive, non-experimental re- search design was used in this project

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project

Student paper Descriptive Statistics and Assumption Testing

Original source Descriptive Statistics and Assumption Testing

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Student paper Safety training has been effective in reducing lost time hours.

Original source Determine if safety training has been effective in reducing lost-time hours

Student paper The revised program in new employ- ee training is more effective than the prior training program.

Original source Is the revised new employee training program more effective than the pri- or new employee training program

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Student paper There is a difference in the return

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There is a difference in the return on investment on all the lines of service.

Original source There is significant difference in the return-on-investment from all the lines of service

Student paper To establish the relationship between PM size and employee health.

Original source Is there a relationship between the PM size and employee health

1 1

Student paper To establish if training has been successful in reducing lost time hours and, if so, how to predict lost time hours from training expenditures.

Original source To determine if training has been successful in reducing lost-time hours and, if so, how to predict lost- time hours from training expenditures

1 5

Student paper Safety training has been quite effec-

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Student paper 67%

Student paper 77%

Student paper 80%

Safety training has been quite effec- tive in reducing lost time hours.

Original source Determine if safety training has been effective in reducing lost-time hours

1 2

Student paper To establish the dB levels of work environments.

Original source To predict the decibel (dB) levels of future work environments

Student paper To establish if the revised program is more effective than the prior training program in new employee training. The revised program was found to be more effective in a new employee training program than the prior train- ing (Wachter and Yorio, 2014).

Original source Is the revised new employee training program more effective than the pri- or new employee training program Is the revised new employee training program more effective than the pri- or new employee training program

1 2

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80%

Student paper 78%

Student paper 72%

ProQuest document 68%

2 Student paper To determine if blood lead levels have increased in employees after a 2- year lead remediation project.

Original source To verify if blood lead levels have increased during the 2-year lead re- mediation project

1 3

Student paper To establish if the return on invest- ment is the same for all lines of service.

Original source To determine if all the lines of ser- vice provided the same return-on- investment

1 6

Student paper The return on investment is not the same for all lines of services.

Original source Determine return on investment on all lines of services

1 7

Student paper H., Kabir, E., & Kabir, S.

Original source Kim KH, Kabir E, Kabir S

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Student paper 100%

Student paper 68%

ProQuest document 64%

ProQuest document 100%

Kim KH, Kabir E, Kabir S

1 8

Student paper A review on the human health im- pact of airborne particulate matter.

Original source A review on the human health im- pact of airborne particulate matter

Student paper Sage Publications Limited.

Original source Sage Publications, Inc

1 9

Student paper K., & Yorio, P.

Original source & Yorio, P.L

2 0

Student paper A system of safety management practices and worker engagement for reducing and preventing acci- dents: An empirical and theoretical investigation.

Original source A system of safety management practices and worker engagement

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ProQuest document 98%

practices and worker engagement for reducing and preventing acci- dents An empirical and theoretical investigation

1 9

Student paper Accident Analysis & Prevention, 68, 117-130.

Original source Accident Analysis and Prevention, 68, 117-130

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