Repeat Exercise 21 "Analysis of Last Digits" using the mean instead of the standard deviation. Compare the confidence interval to the one that would be found using the methods of Section 7-2.
Weights of respondents were recorded as part of the California Health Interview Survey. The last digits of weights from 50 randomly selected respondents are listed below.
5 0 1 0 2 0 5 0 5 0 3 8 5 0 5 0 5 6 0 0 0 0 0 0 8
5 5 0 4 5 0 0 4 0 0 0 0 0 8 0 9 5 3 0 5 0 0 0 5 8
a. Use the bootstrap method with 1000 bootstrap samples to find a 95% confidence interval estimate of s.
b. Find the 95% confidence interval estimate of σ found by using the methods of Section 7-3.
c. Compare the results. If the two confidence intervals are different, which one is better? Why?