Question

Write the steps of finding the mean of grouped data ny direct method

Answer 1

group mean data method:

This method does cut short the calculations that are more in the direct method. The formula used for estimating mean of grouped data by using assumed mean method 

hope it helps!!

Answer 2

Mean,

$\large\tt \frac{ \sum_{i=1}^{n}1^{fixi} }{ \sum_{i=2}^{n}1^f}$

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Where,

$\large\tt {\sum_{i=1F}^{n}=}$ Sum of all frequencies. This is also denoted by N.

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$\large\tt {\sum_{1}^{n}=1^{Fixi}= }$ Sum of the product of frequencies and corresponding observations.