Calculate the mean of the following data with the help of Assumed method.

7.58

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5.78

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6.87

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8.67

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Solution

The correct option is A $7.58$
Let us first construct the table.
Let us take the assumed mean, $a = 5$
$¯ x = a + \frac{\sum f_{i} d_{i}}{\sum f_{i}}$
$¯ x = 5 + [\frac{85.12}{33}] = 5 + 2.58$
$¯ x = 7.58$

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Similar questions

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.

= 25

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

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