The daily car rental rates for a sample of eight cities follow.
City Daily Car Rental Rate ($)
Atlanta ………….. 47
Chicago …………. 50
Dallas …………. 53
New Orleans ………. 45
Phoenix ………… 40
Pittsburgh ……….. 43
San Francisco ……….. 39
Seattle …………. 37
a. Compute the variance and the standard deviation for these data.
b. What is the 95% confidence interval estimate of the variance of car rental rates for the population?
c. What is the 95% confidence interval estimate of the standard deviation for the population?
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