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The mean deviation about the mean of the...

The mean deviation about the mean of the following distribution is
`{:("Size",20,21,22,23,24),("Frequency",6,4,5,1,4):}`

A

1

B

1.25

C

1.5

D

1.75

Text Solution

Verified by Experts

The correct Answer is:
B

Now, `overline(x)=(sumf_(i)x_(i))/(sum f_(i))=(433)/(20)=21.65`
` therefore M.D. =(sumf_(i)|x_(i)-overline(x)|)/(sum f_(i))=(25)/(20)=1.25`
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