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

A = 25, ∑ f_id_i= 110, ∑ f_i = 50.

Find the mean.

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Solution

According to assumed-mean method,

$\bar{x} = A + \frac{\sum_{i} f_{i} d_{i}}{\sum_{i} f_{i}} = 25 + \frac{110}{50} = 25 + 2.2 = 27.2$

Thus, mean is 27.2.

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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.

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

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