MAT 510 WEEK 11 EXAM.DOCX

MAT 510 WEEK 11 EXAM

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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?

Answer
 
 
 
 
 
 
 
Question 3
4 out of 4 points

 
 
 
Improving the quality of process measurements is:

Answer
 
 
 
 
 
 
 
Question 4
4 out of 4 points

 
 
 
Sub-optimization occurs when:

Answer
 
 
 
 
 
 
 
Question 5
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
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?

Answer
 
 
 
 
 
 
 
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?

Answer
 
 
 
 
 
 
 
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?

Answer
 
 
 
 
 
 
 
Question 9
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 10
4 out of 4 points

 
 
 
The histogram has which of the following limitations?

Answer
 
 
 
 
 
 
 
Question 11
4 out of 4 points

 
 
 
Tips for building useful models include:

Answer
 
 
 
 
 
 
 
Question 12
0 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 13
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 14
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 15
0 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 16
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 17
0 out of 4 points

 
 
 
Which of the following is the best description of randomization?

Answer
 
 
 
 
 
 
 
Question 18
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
Question 19
4 out of 4 points

 
 
 
A 32 experiment means that we are experimenting with:

Answer
 
 
 
 
 
 
 
Question 20
4 out of 4 points

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


Answer
 
 
 
 
 
 
 
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?

Answer
 
 
 
 
 
 
 
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.

Answer
 
 
 
 
 
 
 
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?

Answer
 
 
 
 
 
 
 
Question 24
4 out of 4 points

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

Answer
 
 
 
 
 
 
 
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?

Answer
 
 
 
 
 
 
 
 
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