Elementary Statistics - With CD and Access
12th Edition
ISBN: 9780321934895
Author: Triola
Publisher: PEARSON
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Chapter 11, Problem 4RE
To determine
To test: Whether there is sufficient evidence to reject the claim that wearing a helmet has no effect on whether facial injuries are received or not.
To check: Whether a helmet seems to be effective in helping to prevent facial injuries in a crash or not.
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Independent random samples of 32 people living on the west side of a city and 30 people living on the east side of a city were taken to determine if the income levels of west side residents are significantly different from the income levels of east side residents. Given the testing statistics below, determine if the data provides sufficient evidence to conclude that the income levels of west side residents are significantly different from the income levels of east side residents, at the 2% significance level.
H0:μw=μeHa:μw≠μe
t0=2.364
t0.01=±2.099
Select the correct answer below:
No; the test statistic is not between the critical values.
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Yes; the test statistic is not between the critical values.
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Chapter 11 Solutions
Elementary Statistics - With CD and Access
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