Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 8.9, Problem 8.80E
To determine
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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
Introduction to Probability and Statistics
Ch. 8.4 - Prob. 8.3ECh. 8.4 - Prob. 8.4ECh. 8.4 - Prob. 8.5ECh. 8.4 - Prob. 8.6ECh. 8.4 - Prob. 8.7ECh. 8.4 - Prob. 8.8ECh. 8.4 - Prob. 8.9ECh. 8.4 - Prob. 8.10ECh. 8.4 - Prob. 8.11ECh. 8.4 - Prob. 8.12E
Ch. 8.4 - Prob. 8.13ECh. 8.4 - Prob. 8.14ECh. 8.4 - Prob. 8.15ECh. 8.4 - Prob. 8.16ECh. 8.4 - Prob. 8.18ECh. 8.4 - Prob. 8.19ECh. 8.4 - Hotel Costs Even within a particular chain of...Ch. 8.4 - Prob. 8.21ECh. 8.5 - Find and interpret a 95% confidence interval for a...Ch. 8.5 - Find a 90% confidence interval for a population...Ch. 8.5 - Prob. 8.26ECh. 8.5 - Prob. 8.27ECh. 8.5 - Prob. 8.28ECh. 8.5 - Prob. 8.29ECh. 8.5 - Compare the confidence intervals in Exercise 8.29....Ch. 8.5 - Prob. 8.31ECh. 8.5 - Prob. 8.32ECh. 8.5 - Prob. 8.33ECh. 8.5 - Prob. 8.34ECh. 8.5 - Prob. 8.35ECh. 8.5 - Prob. 8.36ECh. 8.5 - Prob. 8.38ECh. 8.5 - What’s Normal? What is normal, when it comes to...Ch. 8.5 - Prob. 8.40ECh. 8.6 - Independent random samples were selected from...Ch. 8.6 - Prob. 8.42ECh. 8.6 - Prob. 8.43ECh. 8.6 - Prob. 8.44ECh. 8.6 - Prob. 8.45ECh. 8.6 - Prob. 8.46ECh. 8.6 - Prob. 8.47ECh. 8.6 - Prob. 8.48ECh. 8.6 - Prob. 8.49ECh. 8.6 - Prob. 8.50ECh. 8.6 - Hotel Costs Refer to Exercise 8.20. The means and...Ch. 8.6 - Noise and Stress To compare the effect of stress...Ch. 8.6 - Prob. 8.53ECh. 8.7 - Prob. 8.54ECh. 8.7 - Prob. 8.55ECh. 8.7 - Prob. 8.56ECh. 8.7 - Prob. 8.58ECh. 8.7 - Prob. 8.61ECh. 8.7 - Prob. 8.64ECh. 8.7 - Prob. 8.65ECh. 8.7 - Prob. 8.66ECh. 8.9 - Prob. 8.67ECh. 8.9 - Prob. 8.68ECh. 8.9 - Prob. 8.69ECh. 8.9 - Prob. 8.70ECh. 8.9 - Prob. 8.71ECh. 8.9 - Prob. 8.72ECh. 8.9 - Prob. 8.73ECh. 8.9 - Prob. 8.75ECh. 8.9 - Prob. 8.77ECh. 8.9 - Prob. 8.78ECh. 8.9 - Prob. 8.80ECh. 8.9 - Prob. 8.81ECh. 8.9 - Prob. 8.83ECh. 8 - Prob. 8.86SECh. 8 - Prob. 8.87SECh. 8 - Prob. 8.88SECh. 8 - Prob. 8.89SECh. 8 - Prob. 8.90SECh. 8 - Prob. 8.91SECh. 8 - Prob. 8.92SECh. 8 - Prob. 8.93SECh. 8 - Prob. 8.94SECh. 8 - Prob. 8.95SECh. 8 - Prob. 8.96SECh. 8 - Prob. 8.98SECh. 8 - Prob. 8.99SECh. 8 - Prob. 8.100SECh. 8 - Prob. 8.101SECh. 8 - Prob. 8.103SECh. 8 - Prob. 8.107SECh. 8 - Prob. 8.108SECh. 8 - Prob. 8.109SECh. 8 - Prob. 8.110SECh. 8 - Prob. 8.111SECh. 8 - Prob. 8.112SECh. 8 - Prob. 8.113SECh. 8 - Prob. 8.114SECh. 8 - Prob. 8.115SECh. 8 - Prob. 8.116SECh. 8 - Prob. 8.117SE
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