Question

Find the mean of each of the following frequency distributions:
Class interval:
0−8
8−16
16−24 24−32
32−40
Frequency:
5
9
10
8
8

Answer 1

Answer:

4,12,20,28,36

Step-by-step explanation:

mean= adding values÷2

(0+8)÷2=4

Answer 2

Answer:

(a) Mean = (4×5)+(12×9)+(20×10)+(28×8)+(36×8)

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(5+9+10+8+8)

Mean = 20+108+200+224+288

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40

Mean = 840

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40

Mean = 21

Step-by-step explanation:

In order to find the mean you approximate by saying each interval is represented by its mid-point. For the 0-8 interval you say there are 5 frequency of 4 [ that it (0+8)÷2 = 4 ]