The fact that processes tend to be dynamic, rather than static, is a key principle of

statistical thinking. Which of the following is a natural consequence of this fact?

Viewing a business as a system is important because

Improving the quality of process measurements is

The frameworks discussed in Chapter 4 could be considered more specific examples of

Nonrandom

and unpredictable patterns on a control chart indicate

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

distribution

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 the shape of the distribution

A process is said to be capable if

Based on the flow chart for selecting control charts discussed in Chapter 5, which type

of chart would be most appropriate if I am charting the % waste in a factory each month?

This value is calculated by taking the total waste in tons within the factory each month,

and dividing by total output, also in tons

Which of the following is NOT a reason for adjusted RSquare

being low

A statistic that is used to indicate too much correlation between the predictors in a

regression analysis is called the

Process models are used to

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

means:

Models based on subject matter fundamentals (theory) are generally better than

statistical models for

In the experimental layout below, which are the most important factors

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

the basic reason for randomness of sampling in design of experiments is

What should one consider when analyzing the results of an experiment

in every experiment there is experimental error. Which of the following statements is

true

We conducted a t test to compare the average cycle time to approve two different types

of loans, auto and personal. The pvalue

for the t test was .

03, where the hypotheses

were

Which of the following would be plausible values for the endpoints of a 95% confidence

e have conducted an election poll of 600 likely voters, collected as randomly as possible.

The 95% confidence interval (CI) for those planning to vote for Senator Smith is about

55% +/4%.

How many additional likely voters would we need to poll to reduce the CI

width to +/2%?

Hint – you do not need to calculate the exact value to answer this

question

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

Based on a regression model, I have developed a 95% prediction interval for the time it

will take me to run a mile under specific conditions (weather, what I have eaten & drank,

running shoes used, and so on). This interval goes from 5.2 minutes to 6.1 minutes.

Which of the following could be an accurate description of this interval

A local university ran a regression model on factors impacting starting job salary of

employed graduates. After validating this as a reasonable model, the university noted

that the regression coefficient for GPA had a pvalue

of .10. Which of the following would

be a reasonable conclusion in this case