# BSOP-326 Total Quality Management Week 6 – Statistical Thinking and Process Improvement

Grading SummaryGrade Details – All Questions

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

Student Answer: descriptive statistics analytical statistics inferential statistics predictive statistics

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

Student Answer: point estimates random variables statistics parameters

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

Student Answer: 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?

Student Answer: 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?

Student Answer: Stabilizing Bullwhipping Tampering Monitoring

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

Student Answer: 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?

Student Answer: Histogram 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.

Student Answer: process owner customer environment manager

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

Student Answer: 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 _____.

Student Answer: 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.

Student Answer: 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. CHART

Student Answer: 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 D42 1.880 0 3.2673 1.023 0 2.5754 0.729 0 2.2825 0.577 0 2.1156 0.483 0 2.004 Student Answer: UCL = 9.3016 UCL = 1.4696 UCL = 11.3256 UCL = 8.8176

1. Question : (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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