In a study of how chief executive officers (CEOs) spend their days, it was found that CEOs spend an average of about 18 hours per week in meetings, not including conference calls,
business meals, and public events. Shown here are the times spent per week in meetings (hours) for a sample of 25 CEOs.
14
15 18 23 16
19 21 13 16 23
23 21 16 21 21
17 16 18 18 19
19 22 24 21 11
(a) What is the least amount of time (in hours) a CEO spent per week in meetings in this sample?
11
h
What is the highest amount of time (in hours) a CEO spent per week in meetings in this sample?
24
h
(b) Use a bin width of 2 hours to prepare a frequency distribution and a percent frequency distribution for the data.
Hours in
Meetings
per Week
Frequency
Percent
Frequency (%)
11-12
4
17.39
13-14
4
17.39
15-16
3
13.04
17-18
3
13.04
19-20
3
13.04
21-22
3
13.04
23-24
3
13.04
Total
25
100
(c) Prepare a histogram.
Frequency
Frequency
10
10
8
8
6
6
4
4
2
2
0
0
11-12 13-14 15-16 17-18 19-20 21-22 23-24
Hours per Week in Meetings
11-12 13-14 15-16 17-18 19-20 21-22 23-24
Hours per Week in Meetings
Comment on the shape of the distribution.
