Find the mean of the data summarized in the given frequency distribution. 1) The manager of a bank recorded the amount of time each customer spent waiting in line during pea 1)

business hours one Monday. The frequency distribution below summarizes the results. Find the me

waiting time. Round your answer to one decimal place.

Waiting time Number of

(minutes) customers

0-3

9

4-7

11

8 - 11

13

12 - 15

5

16 - 19

7

20-23

3

24 - 27

1

A) 9.9 min

B) 7.0 min

C) 13.5 min

D) 9.7 min