In the formula


In the formula $\bar{x}=a+h\left(\frac{\Sigma f_{i} u_{i}}{\Sigma f_{i}}\right)$, for finding the mean of grouped frequency distribution $u_{i}$ is equal to

(a) $\frac{x_{i}+a}{h}$

(b) $h\left(x_{i}-a\right)$

(c) $\frac{x_{i}-a}{h}$

(d) $\frac{a-x_{i}}{h}$


(c) Given, $\bar{x}=a+h\left(\frac{\Sigma f_{i} U_{i}}{\Sigma f_{j}}\right)$

Above formula is a step deviation formula.


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