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Question: For a frequency distribution, standard deviation is computed by...

For a frequency distribution, standard deviation is computed by

A

σ=∑f(x−xˉ)∑f\sigma = \frac { \sum f ( x - \bar { x } ) } { \sum f }

A

(d) σ=∑f(x−xˉ)∑f\sigma = \sqrt { \frac { \sum f ( x - \bar { x } ) } { \sum f } }

B

σ=∑f(x−xˉ)2∑f\sigma = \frac { \sqrt { \sum f ( x - \bar { x } ) ^ { 2 } } } { \sum f }

C

σ=∑f(x−xˉ)2∑f\sigma = \sqrt { \frac { \sum f ( x - \bar { x } ) ^ { 2 } } { \sum f } }

Answer

σ=∑f(x−xˉ)2∑f\sigma = \sqrt { \frac { \sum f ( x - \bar { x } ) ^ { 2 } } { \sum f } }

Explanation

Solution

It is obvious.