Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Textbook Question
Chapter 20.6, Problem 10JC
Recall the experiment comparing patients 4 weeks after surgery for carpal tunnel syndrome. The patients who had endoscopic surgery demonstrated a
10. The P-value of the test was less than 0.05. State a brief conclusion.
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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 20 Solutions
Intro Stats
Ch. 20.3 - A public broadcasting station plans to launch a...Ch. 20.3 - Prob. 2JCCh. 20.4 - Prob. 3JCCh. 20.4 - Prob. 4JCCh. 20.5 - Prob. 5JCCh. 20.5 - Prob. 6JCCh. 20.5 - Prob. 7JCCh. 20.5 - Prob. 8JCCh. 20.6 - Prob. 9JCCh. 20.6 - Recall the experiment comparing patients 4 weeks...
Ch. 20.6 - Prob. 11JCCh. 20 - Canada Suppose an advocacy organization surveys...Ch. 20 - Non-profits Do people who work for non-profit...Ch. 20 - Prob. 3ECh. 20 - Prob. 4ECh. 20 - Canada, deux The information in Exercise 1 was...Ch. 20 - Prob. 6ECh. 20 - Prob. 7ECh. 20 - Prob. 8ECh. 20 - Prob. 9ECh. 20 - Prob. 10ECh. 20 - Prob. 11ECh. 20 - Prob. 12ECh. 20 - Prob. 13ECh. 20 - Athlete ages, again Using the summary statistics...Ch. 20 - Prob. 15ECh. 20 - Athlete ages, ninth inning The researchers in...Ch. 20 - Prob. 17ECh. 20 - Athlete ages, overtime Repeat the test you did in...Ch. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Prob. 22ECh. 20 - Prob. 23ECh. 20 - Prob. 24ECh. 20 - Prob. 25ECh. 20 - Prob. 26ECh. 20 - Prob. 27ECh. 20 - Graduation The U.S. Department of Commerce...Ch. 20 - Prob. 29ECh. 20 - Carpal tunnel The painful wrist condition called...Ch. 20 - Prob. 31ECh. 20 - Prob. 32ECh. 20 - Ear infections A new vaccine was recently tested...Ch. 20 - Anorexia The Journal of the American Medical...Ch. 20 - Prob. 35ECh. 20 - Prob. 36ECh. 20 - Teen smoking A Vermont study published by the...Ch. 20 - Depression A study published in the Archives of...Ch. 20 - Birthweight The Journal of the American Medical...Ch. 20 - Politics and sex One month before the election, a...Ch. 20 - Prob. 41ECh. 20 - Prob. 42ECh. 20 - Pain Researchers comparing the effectiveness of...Ch. 20 - Gender gap Candidates for political office realize...Ch. 20 - Prob. 45ECh. 20 - Prob. 46ECh. 20 - Sensitive men In the same article from Exercise...Ch. 20 - Carbs Recently, the Gallup Poll asked 1005 U.S....Ch. 20 - Food preference GfK Roper Consulting gathers...Ch. 20 - Prob. 50ECh. 20 - Hot dogs In the July 2007 issue, Consumer Reports...Ch. 20 - Prob. 52ECh. 20 - Prob. 53ECh. 20 - Prob. 54ECh. 20 - Hot dogs, last one In Exercise 53, we saw a 90%...Ch. 20 - Third load of wash In Exercise 54, we saw a 98%...Ch. 20 - Prob. 57ECh. 20 - Prob. 58ECh. 20 - Prob. 59ECh. 20 - Prob. 60ECh. 20 - Commuting A man who moves to a new city sees that...Ch. 20 - Pulse rates A researcher wanted to see whether...Ch. 20 - 63. View of the water How much extra is having a...Ch. 20 - New construction The house sales we looked at in...Ch. 20 - Cereal sugar The data below show the sugar content...Ch. 20 - Prob. 66ECh. 20 - Prob. 67ECh. 20 - Prob. 68ECh. 20 - Prob. 69ECh. 20 - Prob. 70ECh. 20 - Prob. 71ECh. 20 - Prob. 72ECh. 20 - Prob. 73ECh. 20 - Prob. 74ECh. 20 - Prob. 75ECh. 20 - Ad campaign You are a consultant to the marketing...Ch. 20 - Prob. 77ECh. 20 - Thirsty? Researchers randomly assigned...Ch. 20 - Prob. 79ECh. 20 - Prob. 80ECh. 20 - 81. Running heats In Olympic running events,...Ch. 20 - Prob. 82ECh. 20 - Tees Does it matter what kind of tee a golfer...Ch. 20 - Golf again Given the test results on golf tees...Ch. 20 - Music and memory Is it a good idea to listen to...Ch. 20 - Rap Using the results of the experiment described...
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