Listed below are 15 Los Angeles commute times (based on a sample from Data Set 31 “Commute Times” in Appendix B).

Data Set 31

a. Use 1000 bootstrap samples to construct a 99% confidence interval estimate of the population mean.

b. Given that Exercise 15 in Section 7-2 used the same data for a 99% confidence interval based on use of the t distribution, and given that the data do not appear to be from a normally distributed population, which confidence interval is likely to be better: The confidence interval from part (a) or the confidence interval found in Exercise 15 in Section 7-2?

BOSTON MA NEW YORK NY LOS ANGELES CA CHICAGO IL DALLAS TX BOISE ID 45 30 151 250 POUGHKEEPSIE NY BURLINGTON VT 45