Waiting times (in minutes) of customers in a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the mean and median for each of the two samples, then compare the two sets of results.

Single Line

6.5

6.6

6.7

6.8

7.1

7.3

7.6

7.7

7.7

7.7

Individual Lines

4.4

5.5

5.9

6.1

6.7

7.7

7.7

8.7

9.2

9.8

The mean waiting time for customers in a single line is

nothing

minutes.

The median waiting time for customers in a single line is

nothing

minutes.

The mean waiting time for customers in individual lines is

nothing

minutes.

The median waiting time for customers in individual lines is

nothing

minutes.

Determine whether there is a difference between the two data sets that is not apparent from a comparison of the measures of center. If so, what is it?

A.

The times for customers in individual lines are much more varied than the times for customers in a single line.

B.

The times for customers in a single line are much more varied than the times for customers in individual lines.

C.

There is no difference between the two data sets.7