Measures of Central Tendency and Dispersion

Question : 114 of 211

Marks: +1, -0

Correct formula for mean deviation from a constant

{A}

of a series in which the variate values

x_{1}, x_{2}, . . . . . ., x_{n}

have frequencies

f_{1}, f_{2}

. . . . . f_{n}

respectively is:
where

{i}=1,2, . . ., {k}

and

∑↙{i} f_{i}=N

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