Essentials of Statistics, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780321926739
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 10.2, Problem 12BSC
Clusters Refer to the following Minitab-generated
- a. Examine the pattern of the four points in the lower left comer (from women) only, and subjectively determine whether there appears to be a
correlation between x and y for women. - b. Examine the pattern of the four points in the upper right corner (from women) only, and subjectively determine whether there appears to be a correlation between x and y for men.
- c. Find the linear
correlation coefficient using only the four point- in the lower left coma (for women) Will the tour points in the upper left comer (for men) have the same linear correlation coefficient ? - d. Find the value of the linear correlation coefficient using all eight points. What does that value suggest about the relationship between x and y?
- e. Based on the preceding results, what do you conclude? Should the data from women and the data from men be considered together, or do they appear to represent two different and distinct populations that should be analyzed separately?
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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 10 Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
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