# Question

A sample of seven passengers boarding a domestic flight produced the following data on weights (in pounds) of their carry-on bags.
a. Using the formula from Chapter 3, find the sample variance, s2, for these data.
b. Make the 98% confidence intervals for the population variance and standard deviation. Assume that the population from which this sample is selected is normally distributed.
c. Test at a 5% significance level whether the population variance is larger than 20 square pounds.

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