While calculating the mean of a given data by the assumed-mean method,the following values were obtained:

A=25, $\sum f_{i} d_{i} = 110, \sum f_{i} = 50.$

Find the mean.

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Solution

Assumed mean method
=A +(∑fidi/∑fi)
Mean=25+(110/50)
=25+2.2
=27.2

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Similar questions

In the formula $¯ x = A + \frac{\sum f_{i} d_{i}}{\sum f_{i}}$ , the A stands for assumed mean.

In the formula $M e a n = a + \frac{\sum f_{i} d_{i}}{\sum f_{i}}$ , the a stands for assumed mean.

(A) = 1100, \sum f_{i} d_{i} = 800

\sum f_{i} = 100

= 25

$C . I$	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$
$f$	$7$	$10$	$15$	$8$	$10$

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