1. QM 520 SP2025 V
2. Week Eight: Nonparametric Statistics - Analysis of Categorical Data
3. Quiz #4
Status Finished
Started Thursday, May 22, 2025, 4:33 PM
Completed Thursday, May 22, 2025, 5:37 PM
Duration 1 hour 3 mins
Grade 96.00 out of 100.00
Question 1
Correct
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Question text
The table below describes the price of a stock change as either up, no change,
or down for today’s and yesterday’s prices. Price changes were examined for
100 days. A financial theory states that stock prices follow what is called a
“random walk.” This means, in part, that the price change today for a stock
must be independent of yesterday’s price change. What is the value of the test
statistic, using the data in table below?
Question 1Select one:
a.
2.9186
b.
0.2986
c.
1.2986
d.
0.2000
Feedback
The correct answer is: 1.2986
, Question 2
Correct
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Question text
What happens to the Chi-Square distribution, when df increased, i.e. df=10?
Question 2Select one:
a.
Becomes more platykurtic
b.
Approaches a normal distribution
c.
Becomes more leptokurtic
d.
None of the above, df does not affect the Chi-Square distribution
Feedback
The correct answer is: Approaches a normal distribution
Question 3
Correct
4.0 points out of 4.0
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Question text
The table below gives beverage preferences for random samples of teens and
adults.
Test for independence between age (teen vs. adult) and drink preferences.
What is the calculated value for this test statistic?
Question 3Select one:
a.
90.818
b.
15.507
c.
2. Week Eight: Nonparametric Statistics - Analysis of Categorical Data
3. Quiz #4
Status Finished
Started Thursday, May 22, 2025, 4:33 PM
Completed Thursday, May 22, 2025, 5:37 PM
Duration 1 hour 3 mins
Grade 96.00 out of 100.00
Question 1
Correct
4.0 points out of 4.0
Flag question
Question text
The table below describes the price of a stock change as either up, no change,
or down for today’s and yesterday’s prices. Price changes were examined for
100 days. A financial theory states that stock prices follow what is called a
“random walk.” This means, in part, that the price change today for a stock
must be independent of yesterday’s price change. What is the value of the test
statistic, using the data in table below?
Question 1Select one:
a.
2.9186
b.
0.2986
c.
1.2986
d.
0.2000
Feedback
The correct answer is: 1.2986
, Question 2
Correct
4.0 points out of 4.0
Flag question
Question text
What happens to the Chi-Square distribution, when df increased, i.e. df=10?
Question 2Select one:
a.
Becomes more platykurtic
b.
Approaches a normal distribution
c.
Becomes more leptokurtic
d.
None of the above, df does not affect the Chi-Square distribution
Feedback
The correct answer is: Approaches a normal distribution
Question 3
Correct
4.0 points out of 4.0
Flag question
Question text
The table below gives beverage preferences for random samples of teens and
adults.
Test for independence between age (teen vs. adult) and drink preferences.
What is the calculated value for this test statistic?
Question 3Select one:
a.
90.818
b.
15.507
c.
