Question

Calculate the mean for the following distributions:

Class interval 15-25 25-35 35-45 45-55 55-65

Frequency 6 10 8 12 4​

Answer 1

Answer:

A = 50 and h = 10

Mean = A + h x (ΣfiuiNΣfiuiN)

= 50 + 10 x (−240−240)

= 50 – 0.5

= 49.5

Answer 2

Answer:

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