The Transportation Security Administration (TSA) has instituted the PreCheck program for some airline passengers. Individuals who pay a fee, and who are approved, can receive a TSA PreCheck message on their boarding pass that allows expedited screening at many U.S. airports. This program is intended to reduce the screening times for these passengers (source: www.tsa.

gov/tsa-precheck). Suppose for comparison purposes, a sample of the time it took the other passengers to pass through security at Orlando was obtained. The file titled Passtime contains these data.

a. Although the average time to pass through security is of importance, the standard deviation is also important. Conduct a hypothesis test to determine if the standard deviation is greater than 112 minutes

(i.e., 90 seconds). Use a significance level of 0.01.

b. Considering the results of your hypothesis tests in part

a, determine and define the type of statistical error that could have been made.