Elementary Statistics (13th Edition)
13th Edition
ISBN: 9780134462455
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 6.3, Problem 10BSC
In Exercises 7–10, use the same population of {4, 5, 9} that was used in Examples 2 and 5. As in Examples 2 and 5, assume that
10. Sampling Distribution of the Sample Proportion
a. For the population, find the proportion of odd numbers.
b. Table 6-2 describes the sampling distribution of the sample
c. Find the mean of the sampling distribution of the sample proportion of odd numbers.
d. Based on the preceding results, is the sample proportion an unbiased estimator of the population proportion? Why or why not?
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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 6 Solutions
Elementary Statistics (13th Edition)
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