Basic Business Statistics, Student Value Edition
14th Edition
ISBN: 9780134685113
Author: Mark L. Berenson, David M. Levine, David F. Stephan, Kathryn Szabat
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 20PS
The annual NFL Super Bowl is the most widely watched sporting
For the 30-seond ads the 60-second ads separately:
a. Construct a
b. Interpret the interval constructed in (a).
c. What conclusions can you reach about the ad scores of 30-second and 60-second ads?
d. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)?
e. Do you think that the assumption needed in order to construct the confidence interval estimate in (a) is valid? Explain.
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9.2 Testing the Mean mu:
Problem 3
(1 point)
Test the claim that the population of sophomore college
students has a mean grade point average greater than 2.2.
Sample statistics include n = 71, x = 2.44, and s = 0.9.
Use a significance level of a = 0.01.
The test statistic is
The P-Value is between :
The final conclusion is
< P-value <
A. There is sufficient evidence to support the claim that
the mean grade point average is greater than 2.2.
○ B. There is not sufficient evidence to support the claim
that the mean grade point average is greater than 2.2.
Note: You can earn partial credit on this problem.
Note: You are in the Reduced Scoring Period. All work counts for
50% of the original.
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Chapter 8 Solutions
Basic Business Statistics, Student Value Edition
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