In the formula bar{x} = A + frac{Sigma f_{i} | vedclass

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(C) The given formula $\bar{x} = A + \frac{\Sigma f_{i} u_{i}}{\Sigma f_{i}} 	imes c$ is the step-deviation method used to calculate the mean of grou

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class length

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(C) The given formula $\bar{x} = A + \frac{\Sigma f_{i} u_{i}}{\Sigma f_{i}} 	imes c$ is the step-deviation method used to calculate the mean of grouped data.In this formula:- $\bar{x}$ is the mean.- $A$ is the assumed mean.- $f_{i}$ is the frequency of the $i^{th}$ class.- $u_{i} = \frac{x_{i} - A}{c}$,where $x_{i}$ is the class mark.- $c$ represents the class length (or class size),which is the difference between the upper limit and the lower limit of a class interval.

In the formula $\bar{x} = A + \frac{\Sigma f_{i} u_{i}}{\Sigma f_{i}} \times c$,$c$ represents .......

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