Chapter 9 Statistics Worksheet With Answers Page 21
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30Chapter 9 Review Exercises
237
19. a. Score Frequency Score Frequency
c.,f.
Class
Frequency
Cumulative
Interval
Frequency
21
2
73
2
60−69.9
8
19
33
1
74
1
70−79.9
12
31
41
2
75
1
80−89.9
11
42
42
1
77
1
90−99.9
6
48
44
1
78
2
100−109.9
2
50
48
1
80
4
52
2
82
1
55
1
83
1
60
1
85
2
62
1
87
2
63
2
89
1
66
2
90
3
68
1
91
1
69
1
92
1
70
2
95
1
71
1
100
2
d.
72
2
The range of scores is 100 − 21 = 79.
b.
e. The distribution is skewed left.
g.
c.,f.
Class
Frequency
Cumulative
Interval
Frequency
20−29.9
2
2
30−39.9
1
3
40−49.9
5
8
50−59.9
3
11
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