Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Textbook Question
Chapter 2.2, Problem 3JC
A statistics class reports the following data on Gender and Eye Color for students in the class:
3. What percent of students are brown-eyed females?
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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 2 Solutions
Intro Stats
Ch. 2.2 - A statistics class reports the following data on...Ch. 2.2 - A statistics class reports the following data on...Ch. 2.2 - A statistics class reports the following data on...Ch. 2.2 - Prob. 4JCCh. 2.2 - Prob. 5JCCh. 2.2 - A statistics class reports the following data on...Ch. 2.2 - Prob. 7JCCh. 2 - Prob. 1ECh. 2 - Prob. 2ECh. 2 - Prob. 3E
Ch. 2 - Marriage in decline Changing attitudes about...Ch. 2 - 5. Movies again The following table summarizes 348...Ch. 2 - Prob. 6ECh. 2 - Prob. 11ECh. 2 - 12. Movie ratings The pie chart shows the ratings...Ch. 2 - Prob. 13ECh. 2 - Prob. 14ECh. 2 - Prob. 15ECh. 2 - Prob. 16ECh. 2 - Prob. 17ECh. 2 - Prob. 18ECh. 2 - Prob. 19ECh. 2 - Prob. 20ECh. 2 - Prob. 21ECh. 2 - Modalities A survey of athletic trainers asked...Ch. 2 - Prob. 23ECh. 2 - Prob. 24ECh. 2 - Prob. 25ECh. 2 - Prob. 26ECh. 2 - Prob. 27ECh. 2 - Politics Students in an Intro Stats course were...Ch. 2 - More about seniors Look again at the table of...Ch. 2 - Politics revisited Look again at the table of...Ch. 2 - Prob. 31ECh. 2 - More politics Look once more at the table...Ch. 2 - Prob. 33ECh. 2 - Parking lots A survey of autos parked in student...Ch. 2 - Weather forecasts Just how accurate are the...Ch. 2 - Prob. 36ECh. 2 - Blood pressure A company held a blood pressure...Ch. 2 - Prob. 38ECh. 2 - Prob. 39ECh. 2 - Antidepressants and bone fractures For a period of...Ch. 2 - Prob. 41ECh. 2 - Prob. 42ECh. 2 - Hospitals Most patients who undergo surgery make...Ch. 2 - Delivery service A company must decide which of...Ch. 2 - Graduate admissions A 1975 article in the magazine...Ch. 2 - Be a Simpson Can you design a Simpsons paradox?...
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