Calculate the mean of the given data using assumed mean method. Provided that the assumed mean ‘𝒂’ is 17.

18.1

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17.8

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19.1

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18.8

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Solution

The correct option is D 18.8

From the given table, we can find that
$\sum f_{i} \times d_{i} = 72 \sum f_{i} = 40$

$Mean = a + \frac{\sum f_{i} \times d_{i}}{\sum f_{i}} = 17 + \frac{72}{40} = 18.8$

hence, the mean of the given data is 18.8.

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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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