Question
In its 2016 Auto Reliability survey, Consumer Reports asked subscribers to report their maintenance and repair costs. Most individuals are aware of the fact that
In its 2016 Auto Reliability survey, Consumer Reports asked subscribers to report their maintenance and repair costs. Most individuals are aware of the fact that the average annual repair cost for an automobile depends on the age of the automobile. A researcher is interested in finding out whether the variance of the annual repair costs also increases with the age of the automobile. A sample of 26 automobiles 4 years old showed a sample standard deviation for annual repair costs of $150 and a sample of 25 automobiles 2 years old showed a sample standard deviation for standard repair costs of $100.
a. State the Null and alternative hypothesis.
b. Calculate the Value of the Test Statistic.
c. The P-Value is?
d. Do or do not conclude the hypothesis
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