Question: Question 26

A bank branch located in a commercial district of a city has developed an improved process for serving customers during the 12.00 PM to 1.00 PM peak period. A random sample of 15 customers is selected and the results are as follows: The waiting time in minutes are given below:

4.21, 5.55, 3.02, 5.13, 4.77, 2.34, 3.54, 3.20

4.50, 6.10, 0.38, 5.12, 6.46, 6.19, 3.79

Another branch, located in a residential area, is most concerned with the Friday evening hours from 5.00 PM to 7.00 PM. The waiting time in minutes are given below:

9.66, 5.90, 8.02, 5.79, 8.73, 3.82, 8.01, 8.35

10.49, 6.68, 5.64, 4.08, 6.17, 9.91, 5.47

a. List the five-number summary of the waiting time at the bank branch located in a commercial district of a city.

b. Form the box-and-whisker plot and describe the shape of the distribution of the bank located in a commercial district of a city.

c. List the five-number summary of the waiting time at the bank branch located in a residential area

d. Form the box-and-whisker plot and describe the shape of the distribution of the bank located in the residential area.

e. Compare the results of (a) and (b) to those of (c) and (d).

What similarities and differences are there in the distribution of the waiting time at the two bank branches?