Q. 24.0( 7 Votes )

In calculating the mean of grouped data, grouped in classes of equal width, we may use the formula,

Where, is the assumed mean, must be one of the mid - point of the classes. Is the last statement correct? Justify your answer.

Answer :

No, it is not necessary that assumed mean consider as the mid - point of the class interval. It is considered as any value which is easy to simplify it.

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