MYLAB STATISTICS W/ETEXT ACCESS CARD
6th Edition
ISBN: 9780135901137
Author: Triola
Publisher: PEARSON
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Chapter 8.2, Problem 34BB
Using Confidence Intervals to Test Hypotheses When analyzing the last digits of telephone numbers in Port Jefferson, it is found that among 1000 randomly selected digits, 119 are zeros. If the digits are randomly selected, the proportion of zeros should be 0.1.
a. Use the critical value method with a 0.05 significance level to test the claim that the proportion of zeros equals 0.1.
b. Use the P-value method with a 0.05 significance level to test the claim that the proportion of zeros equals 0.1.
c. Use the sample data to construct a 95% confidence
d. Compare the results from the critical value method, the P-value method, and the confidence interval method. Do they all lead to the same conclusion?
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Chapter 8 Solutions
MYLAB STATISTICS W/ETEXT ACCESS CARD
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