LibraryPirate

A-108 ANSWERS TO ODD-NUMBERED EXERCISES
2.3.5. (a)
Class
Relative
Interval Frequency Frequency
0–2 5 0.1111
3–5 16 0.3556
6–8 13 0.2889
9–11 5 0.1111
12–14 4 0.0889
15–17 2 0.0444
45 1.000
Frequency
18
16
14
12
10
8
6
4
2
0
Histogram of Hours
1 4 7 10 13 16
Hours
Frequency
18
16
14
12
10
8
6
4
2
0
–2
Frequency Polygon of Hours
1 4 7 10
Hours
13 16 19
(b) Skewed right