Most individuals are aware of the fact that the average annual repair cost for an automobiledepends on the age of the automobile. a researcher is interested in finding out whether thevariance of the annual repair costs also increases with the age of the automobile. a sampleof 26 automobiles 4 years old showed a sample standard deviation for annual repair costsof $170 and a sample of 25 automobiles 2 years old showed a sample standard deviationfor annual repair costs of $100.a. state the null and alternative versions of the research hypothesis that the variance inannual repair costs is larger for the older automobiles.
Most individuals are aware of the fact that the average annual repair cost for an automobiledepends on the age of the automobile. a researcher is interested in finding out whether thevariance of the annual repair costs also increases with the age of the automobile. a sampleof 26 automobiles 4 years old showed a sample standard deviation for annual repair costsof $170 and a sample of 25 automobiles 2 years old showed a sample standard deviationfor annual repair costs of $100.a. state the null and alternative versions of the research hypothesis that the variance inannual repair costs is larger for the older automobiles.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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 $170 and a sample of 25 automobiles 2 years old showed a sample standard deviation
for annual repair costs of $100.
a. state the null and alternative versions of the research hypothesis that the variance in
annual repair costs is larger for the older automobiles.
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