TQM Checkpoint6

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Question 1.1. TCO 11) A standard deviation is a _____. (Points : 2)

        sample         descriptive statistic         census         inference statistic

Question 2.2. The vertical line to the peak of the bell curve represents the _____. (Points : 2)

        point estimates         random variables         statistics         mean

Question 3.3. (TCO 11) The sampling method in which every item in the population has an equal probability of being selected is called which of the following?(Points : 2)

        Simple random sampling         Stratified sampling         Systematic sampling         Judgment sampling

Question 4.4. (TCO 11) Calculating the average value of five sample measurements of door width is an example of which of the following? (Points : 2)

        Descriptive statistics         Statistical inference         Predictive statistics         Analytical statistics

Question 5.5. (TCO 11) A subset of items selected from a population is called which of the following? (Points : 2)

        Sample         Statistic         Census         Parameter

Question 6.6. (TCO 12) Which of the following tools is used to identify and isolate causes of a problem? (Points : 2)

        Shewart diagram         Scatter diagram         Cause-and-effect diagram         Histogram

Question 7.7. (TCO 12) Poka-yoke means which of the following? (Points : 2)

        Quality         Fool-proof         Mistake         Tampering

Question 8.8. (TCO 12) A tool that helps everyone begin a project with the same understanding is a _____. (Points : 2)

        Scatter diagram         flow chart         quality circle         pareto chart

Question 9.9. (TCO 12) Which of the following pairs of charts are used together? (Points : 2)

        X-Bar chart and p-chart         R-chart and p-chart         R-chart and s-chart         X-Bar chart and R-chart

Question 10.10. (TCO 12) A bank observes that most customer complaints come from only a small subset of its total customer base. This is an example of which of the following? (Points : 2)

        Clustering analysis         The Pareto principle         Data skewing         The central limit theorem

Question 11.11. (TCO 12) Determine the sample standard deviation(s) for the following data: 7, 9, 2, 0, 1, and 5. (Points : 5)

        s = 2.805         s = 3.266         s = 2.927         s = 3.578 

Question 12.12. (TCO 12) Six samples of subgroup size 5 (n=5) were collected. Determine the upper control limit (UCL) for an X-Bar chart if the mean of the sample averages is 4.7 and mean of the sample ranges is 0.35.   TABLE (Points : 5)

        UCL = 4.86905         UCL = 4.90195         UCL = 4.72250         UCL = 5.05805 

Question 13.13. (TCO 12) Twenty samples of subgroup size of 5 (n = 5) 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.  TABLE (Points : 5)

        UCL = 9.3060         UCL = 1.4695         UCL = 11.3256         UCL = 8.8176 

Essay Questions:

At least 30 words per essay. NO PLAGIARISM!!!

Question 1.

What are the advantages of studying a sample from the population instead of studying the entire population though a census?

             

Question 2.

From the standpoint of SPC, what does the standard deviation measure?

             

Question 3.

What is a judgment sample? 

             

Question 4.

Explain the difference between Type I and Type II errors in the context of a control chart. Why is it important to give operators control over their processes? 

             

Question 5.

What conditions support the use of a control chart for individuals? Discuss any limitations associated with the chart use. Explain the relationship that exists between a histogram and a control chart.