BSOP326 -Total Quality Management -Check Point -Week 6

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(TCO 11) The component of statistical methodology that includes the collection, organization, and summarization of data is called _____.


descriptive statistics


analytical statistics


inferential statistics


predictive statistics


 2.        Question :         (TCO 11) Characteristics of the population are called _____.


point estimates


random variables








 3.        Question :         (TCO 11) Which of the following constitutes an operational approach to reducing sampling error?


Cross-checking research designs with knowledgeable analysts


Questioning the assumption that tomorrow's and today's population are comparable


Taking a larger sample from the population


Reducing conditions that contribute to dissimilar population segments


 4.        Question :         (TCO 11) Calculating the average value of five sample measurements of door width is an example of which of the following?


Descriptive statistics


Statistical inference


Predictive statistics


Analytical statistics



 5.        Question :         (TCO 11) Acting on every result as if it were a special cause of variation is known as which of the following?











 6.        Question :         (TCO 12) A statistical technique that is useful for interpreting scatter diagrams is which of the following?


The average


Correlation analysis


The standard deviation


Nominal group technique



 7.        Question :         (TCO 12) Another name for a cause-and-effect diagram is which of the following?




Run chart


Check sheet


Fishbone diagram



 8.        Question :         (TCO 12) To enable a service process to be mistake-proof, unlike manufacturing processes, the _____ must be considered.


process owner









 9.        Question :         (TCO 12) Which of the following pairs of charts are used together?


X-Bar chart and p-chart


R-chart and p-chart


R-chart and s-chart


X-Bar chart and R-chart


 10.      Question :         (TCO 12) A p-chart is also called a _____.

pre-control chart


probability chart


fraction defective chart


process capability chart



 11.      Question :         (TCO 12) Determine the sample standard deviation(s) for the following data: 7, 8, 2, 1, 3, and 5.



s = 2.805


s = 3.266


s = 2.927


s = 3.578



 12.      Question :         (TCO 12) Six samples of subgroup size 6 (n=6) were collected. Determine the upper control limit (UCL) for an X-Bar chart if the mean of the sample averages is 4.7 and the mean of the sample ranges is 0.35.



UCL = 4.86905


UCL = 4.90195


UCL = 4.72250


UCL = 5.05805


 13.      Question :         (TCO 12) Twenty samples of subgroup size 6 (n=6) were collected for a variable measurement. Determine the upper control limit (UCL) for an R-chart if the mean of the sample ranges equals 4.4.

Factors for calculating control limits:

n          A2       D3       D4

2          1.880   0          3.267

3          1.023   0          2.575

4          0.729   0          2.282

5          0.577   0          2.115

6          0.483   0          2.004



UCL = 9.3016


UCL = 1.4696


UCL = 11.3256


UCL = 8.8176



(TCO 11) What are the advantages of studying a sample from the population instead of studying the entire population though a census?


 2.        Question :         (TCO 11) Define standard error of the mean.



 3.        Question :         (TCO 11) Differentiate between an enumerative study and an analytic study. Which type of study is more appropriate for descriptive statistics, hypothesis testing on the population mean, and time-series analysis?


 4.        Question :         (TCO 12) Explain the difference between Type I and Type II errors in the context of a control chart.



 5.        Question :         (TCO 12) Define the term statistical process control.

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