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.

Question

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.

Philoid · Accepted 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.

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.

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.