# SOLVED:Statistics

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## Description

Question 1

4 out of 4 points

A SIPOC map is:

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Question 2

4 out of 4 points

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?

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Question 3

4 out of 4 points

Process complexity is important because complex processes:
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Question 4
4 out of 4 points
Process measurements are:
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Question 5
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4 out
of 4 points
Suppose the Process Improvement Framework were used to
attack a problem where the process in question was inherently unstable. Which
of the following would be a likely result of this effort?
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Question 6
4 out of 4 points
The histogram below showing ages of credit card holders
displays what type of distribution?
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Question 7
4 out of 4 points
A process is said to be capable if:
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Question 8
4 out of 4 points
A main purpose of a control chart is to:
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Question 9
4 out of 4 points
The histogram has which of the following limitations?
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Question 10
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?
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Question 11
4 out of 4 points
George Box tells us “all models are wrong but some are
useful”. By this comment he means:

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Question 12

4 out of 4 points

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

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Question 13

4 out of 4 points

Which of the following is NOT a reason for adjusted R-Square
being low?

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Question 14

4 out of 4 points

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

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Question 15

4 out of 4 points

Process models are used to:

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Question 16

4 out of 4 points

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

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Question 17

4 out of 4 points

Identify the assumption that is NOT made when conducting an
experiment:

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Question 18

4 out of 4 points

This technique is used to eliminate the effects of nuisance
factors (e.g., machines, day of week, and season of year) from an experiment.

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Question 19

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?

100MPa

200MPa

6.2

11.1

7.3

10.3

8.2

13

8.3

14.3

7.5

11.2

6.5

14.7

9.6

10

9

9.4

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Question 20

4 out of 4 points

Which of the following purposes are served by replicating an
experiment?

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Question 21

4 out of 4 points

We ran a taste-test to see which soft drink employees in our
company prefer. We had 100 employees, selected as randomly as possible, taste
test two brands and determine which they preferred. Which of the following
would be a reasonable statistical analysis to determine if there is a clear
preference among our employees?

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Question 22

4 out of 4 points

We conducted a t test to compare the average cycle time to
approve two different types of loans, auto and personal. The p-value for the t
test was -.03, where the hypotheses were:

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Question 23

4 out of 4 points

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?

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Question 24

4 out of 4 points

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

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Question 25

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 correc