psychology statistics
Ma1234
GradedAssignmentExam.xlsxVersion 01
| PSYC 315 Exam 1 - Spring 2021 Worth 182 points | ||||||||||||||
| Instructions: The sample of data below represent n = 15 observations of psychological stress test score data. | ||||||||||||||
| The higher the value the more stress is measured in a sample of college students. | ||||||||||||||
| Look at the data carefully. | ||||||||||||||
| Show all work and provide interpretations to responses just as we have done in class. | ||||||||||||||
| Place all of your answers in the Empty YELLOW cells. Show all necessasry work. | ||||||||||||||
| Problem 1. | (82 points) | |||||||||||||
| case ## | value | Calculate the Coefficient of Variation and Determine if there are any OUTLIERS. | ||||||||||||
| Case 01 | 7 | Also find the Xp80 | . | |||||||||||
| Case 02 | 24 | Also find the PR(X = 44) | ||||||||||||
| Case 03 | 44 | |||||||||||||
| Case 04 | 46 | Points | ||||||||||||
| Case 05 | 67 | 1 pt. | Find n = | |||||||||||
| Case 06 | 95 | 3 pts. | Find sumX = | |||||||||||
| Case 07 | 113 | 5 pts. | Find sumXX = | |||||||||||
| Case 08 | 116 | |||||||||||||
| Case 09 | 132 | 4 pts. | Find average = | |||||||||||
| Case 10 | 135 | 8 pts. | Find std dev = | |||||||||||
| Case 11 | 153 | 5 pts. | Find the CV = | |||||||||||
| Case 12 | 154 | |||||||||||||
| Case 13 | 162 | 6 pts. | Find Xp80 = | |||||||||||
| Case 14 | 194 | 6 pts. | Find PR(X = 44) = | |||||||||||
| Case 15 | 400 | points lost | ||||||||||||
| Check for Outliers | points possible | |||||||||||||
| Post the steps here as we did in class. | points earned | |||||||||||||
| 5 pts. | Xp25= | percentage earned | ||||||||||||
| 5 pts. | Xp75= | |||||||||||||
| 4 pts. | IQR= | |||||||||||||
| 2 pts. | 1.5(IQR) = | |||||||||||||
| 6 pts. | LLOB = | |||||||||||||
| 6 pts. | ULOB = | |||||||||||||
| 5 pts. | Are there any LLO? | |||||||||||||
| 5 pts. | Are there any ULO? | |||||||||||||
| 6 pts. | Concluding Remarks. | |||||||||||||
| Problem 2. (80 points) | Construct and Display a Bar Chart, a Pareto Chart and a Pie Chart using the following categorical frequency data of young urban adults who identify themselves as suffering from one of the six psychological disorders. | |||||||||||||
| Problems | Frequency | Rel Freq | ||||||||||||
| 1) Anxiety Disorders | 9 | |||||||||||||
| 2) Depressive Disorders | 6 | |||||||||||||
| 3) Eating Disorders | 15 | |||||||||||||
| 4) Bipolar Disorders | 13 | |||||||||||||
| 5) Schizophrenia Disorders | 8 | |||||||||||||
| 6) Post Traumatic Stress Disorders | 13 | |||||||||||||
| Total | 64 | |||||||||||||
| Problem 3. (20 points) | ||||||||||||||
| Look at the data and determine if the data distribution is approximately positively skewed, negatively skewed or symmetric. | ||||||||||||||
| Remember the rules: | ||||||||||||||
| If the mean is less than the median is less than the mode, then the data are approximately negatively skewed. | ||||||||||||||
| If the mode is less than the median is less than the mean, then the data are approximately positively skewed. | ||||||||||||||
| if the mean, the median and the mode are approximately equal, then the data are approximately symmetric. | ||||||||||||||
| case ## | value | |||||||||||||
| case 001 | 9 | mean | (5 pts) | |||||||||||
| case 002 | 47 | median | (5 pts) | |||||||||||
| case 003 | 50 | mode | (5 pts) | |||||||||||
| case 004 | 57 | decision | (5 pts) | |||||||||||
| case 005 | 61 | |||||||||||||
| case 006 | 66 | |||||||||||||
| case 007 | 67 | |||||||||||||
| case 008 | 69 | |||||||||||||
| case 009 | 71 | |||||||||||||
| case 010 | 71 | |||||||||||||
| case 011 | 73 | |||||||||||||
| case 012 | 73 | |||||||||||||
| case 013 | 73 | |||||||||||||
| case 014 | 84 | |||||||||||||
| case 015 | 85 | |||||||||||||
| case 016 | 94 | |||||||||||||
| case 017 | 97 | |||||||||||||
Problems
1) Anxiety Disorders 2) Depressive Disorders 3) Eating Disorders 4) Bipolar Disorders 5) Schizophrenia Disorders 6) Post Traumatic Stress Disorders 9 6 15 13 8 13Problems
Frequency
