Construct a frequency polygon for the following distributions
Class-intervals
0-4
4-8
8 - 12
12-16
16 - 20
20 - 24
frequency
4
7
10
15
11
6
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Class interval Frequency Mid point of class
0−4 4 2
4−8 7 6
8−12 10 10
12−16 15 14
16−20 11 18
20−24 6 22
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