Find out the mean.
Public transportation and the automobile are 2 methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
|
Public Transportations:
|
28
|
29
|
32
|
37
|
33
|
25
|
29
|
32
|
41
|
34
|
|
Automobile:
|
29
|
31
|
33
|
32
|
34
|
30
|
31
|
32
|
35
|
33
|
a. calculate the sample mean time to get to work for each method.
b. calculate the sample standard deviation for each method.
c. On the basis of your results from parts (A) and (B), which method of transportation should be preferred? Explain.
d. build up a box plot for each method. Does a comparison of the box plots support your conclusion in part (C)?