Question 1

4 out of 4 points


Understanding variation is important because variation:






  • Question 2

4 out of 4 points


The Statistical Thinking Strategy illustrated in Figure 2.14 provides a graphic of the overall approach to driving improvement through statistical thinking. Which of the following is a key principle illustrated in this specific graph?






  • Question 3

4 out of 4 points


Improving the quality of process measurements is:






  • Question 4

4 out of 4 points


The Hidden Factory is:






  • Question 5

4 out of 4 points


Which type of variation was critical to resolving the realized revenue case study?






  • Question 6

4 out of 4 points


A process is said to be capable if:






  • Question 7

4 out of 4 points


The histogram below showing ages of credit card holders displays what type of distribution?






  • Question 8

4 out of 4 points


In evaluating data on our process outputs, four characteristics we might investigate are: central tendency, variation, shape of distribution, and stability. Which of the following tools would be most helpful to determine stability of the process?






  • Question 9

4 out of 4 points


Non-random and unpredictable patterns on a control chart indicate:






  • Question 10

4 out of 4 points


A main purpose of a control chart is to:






  • Question 11

4 out of 4 points


Models based on subject matter fundamentals (theory) are generally better than statistical models for:






  • Question 12

4 out of 4 points


A statistic that is used to indicate too much correlation between the predictors in a regression analysis is called the:






  • Question 13

4 out of 4 points


George Box tells us “all models are wrong but some are useful”. By this comment he means:






  • Question 14

4 out of 4 points


Tips for building useful models include:






  • Question 15

4 out of 4 points


The best way to evaluate the validity of a statistical model is:






  • Question 16

4 out of 4 points


Given the plot below, what might you suspect about factors A and B?






  • Question 17

4 out of 4 points


The following table shows data on the effect of Machine Pressure on product hardness.   What statistical test should be used to test the effect of pressure on average hardness?
























  • Question 18

4 out of 4 points


What should one consider when analyzing the results of an experiment?






  • Question 19

4 out of 4 points


In every experiment there is experimental error.  Which of the following statements is true?






  • Question 20

4 out of 4 points


A 32 experiment means that we are experimenting with:






  • Question 21

4 out of 4 points


We are conducting a poll for the mayoral election of a medium sized city, and found with one week before the election that the Democrat candidate is leading with 52% planning to vote for her, 46% planning to vote for the Republican, with 2% not sure. The 95% confidence interval for proportion planning to vote for the Democrat is +/- 3%. Based on this information, and making reasonable assumptions, which of the following statements is correct?






  • Question 22

4 out of 4 points


For which of the following scenarios am I most likely to utilize a Chi-squared test?






  • Question 23

4 out of 4 points


After running an ANOVA comparing the average years of experience between five different job classifications, we obtained a p value of .02. Which of the following would be a reasonable conclusion concerning the population in this case?






  • Question 24

4 out of 4 points


Which of the following could be considered a prediction interval?






  • Question 25

4 out of 4 points


What would happen (other things equal) to a confidence interval if you calculated a 99 percent confidence interval rather than a 95 percent confidence interval?








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