Grouped Frequency Tables
Worked example (Discrete data)
The scores for a group of 60 students in an examination are as follows:
67
37
82
49
45
69
69
81
80
83
72
68
83
91
62
72
64
25
71
72
34
47
56
84
85
59
87
75
51
84
60
58
58
60
28
68
71
73
75
92
48
67
59
57
74
76
43
85
77
66
71
56
64
79
91
69
62
49
39
18
Frequency Tables
The values are grouped together in classes.
In the class 10 - 19, the values 10 and 19 are called the class boundaries. Notice how the boundaries do not overlap. You must be able to tell to which class a value belongs.
Value
Tally
Frequency
0 - 9
0
10 - 19
1
1
20 - 29
11
2
30 - 39
111
3
40 - 49
11115
50 - 59
111111119
60 - 69
11111111111115
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