2-37, Q3:

3. *Public transportation and the automobile are two methods an employee can use to getto work each day. Samples of times recorded for each method are shown. Times are in minutes.

Public Transportation:181513202217 11 143 16

Automobile:1224192119 25 2391710

a)Compute the sample mean time to get to work for each method.

b)Compute the sample standard deviation for each method.

c)On the basis of your results from a) and b), which method of transportation should be preferred?