# MAT 510 Week 11 Final Exam

MAT 510 Week 11 Final Exam

Question 1

4 out of 4 points

The principal drivers of the rapid change in the global economy are:

Question 2

4 out of 4 points

What is tool that can be used to detect the structure variation?

Question 3

4 out of 4 points

Improving the quality of process measurements is:

Question 4

4 out of 4 points

Sub-optimization occurs when:

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

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?

Question 7

0 out of 4 points

A sample of 50 invoices are inspected each shift for errors, and classified as either “good”, i.e., without error, or “bad”, having some problem. If we plot our bad invoices each shift on a control chart, which chart should we use?

Question 8

0 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

The histogram has which of the following limitations?

Question 11

4 out of 4 points

Tips for building useful models include:

Question 12

0 out of 4 points

An Adjusted R-square value is a correlation coefficient that has been modified to account for:

Question 13

4 out of 4 points

Results of regression analysis are often abused in the following ways:

Question 14

4 out of 4 points

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

Question 15

0 out of 4 points

Which of the following is NOT a measure of model adequacy?

Question 16

4 out of 4 points

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

Question 17

0 out of 4 points

Which of the following is the best description of randomization?

Question 18

4 out of 4 points

The basic reason for randomness of sampling in design of experiments is:

Question 19

4 out of 4 points

A 32 experiment means that we are experimenting with:

Question 20

4 out of 4 points

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

Question 21

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?

Question 22

0 out of 4 points

We 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.

Question 23

4 out of 4 points

I have made a mistake in copying data into my computer to perform a large regression model with 20 independent variables. Basically, I ended up with random data in each of the columns. However, I accidentally ran the regression anyway. Making reasonable assumptions, which of the following outcomes is most likely?

Question 24

4 out of 4 points

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

Question 25

4 out of 4 points

I have calculated an interval to document the uncertainty in my estimate of the long-term standard deviation I will experience in time to pay invoices in my business going forward. Baaed on this information, this should be considered what type of interval?