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

Options

A. `sigma=sqrt((sumfd^2)/(sumf)-((sumfd)/(sumf))^2)`
B. `sigma=sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))`
C. `sigma=sqrt((sumfd^2)/(sumf)-(sumfd)/(sumf))`
D. `sigma=sqrt(((sumfd)/(sumf))^2-(sumfd^2)/(sumf))`

Answer

A

Explanation

`sigma=sqrt((sumfd^2)/(sumf)-((sumfd)/(sumf))^2)`is the corrcet option