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For a frequency distribution, standard d...

For a frequency distribution, standard deviation is computed by applying the formula :

A

`sigma = sqrt((sum fd^(2))/(sum f) - ((sum fd)/(sum f))^(2))`

B

`sqrt((sum fd)/(sum f^(2)) - (sum fd^(2))/(sum f))`

C

`sqrt((sum fd^(2))/(sum f)- (sum fd)/(sum f))`

D

None of these

Text Solution

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The correct Answer is:
A
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