The New Jersey teachers union would like to see if there is a difference in the variability
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The New Jersey teacher’s union would like to see if there is a difference in the variability of the salaries earned by high school teachers in Cape May County as compared with those in Camden County. A random sample of teacher salaries from each county was selected, and the standard deviation of each sample was calculated. The data are as follows:
Cape May Camden Sample size 30 27 Sample standard deviation $6,300 $5,200
a. Using a = 0.05, determine if there is a difference in the variability of the salaries for the two populations.
b. Verify your results using PHStat.
c. Interpret the p-value obtained from the software.
AppendixLO1
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