4.15 Students in a class got the following marks
in an assignment - 5, 6, 7, 5, 4, 3, 2, 9, 8, 4, 3, 6, 9,
4,7. The assignment for 10 marks. Prepare
frequency distribution table using tally marks..
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Class Interval
Frequency
10-20
20-30
30-40
40-50
50-60
60-70
10
12
7
7
8
3
(i) For Cumulative Frequency 30−40 frequency is 7
(ii) Size is 11
Mid point for cumulative frequency 30−40 is 35.
(iii) Range =70−10=60
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