No, the assertion isn’t right. It isn’t required that expected mean ought to be the mid – mark of the class span. a can be considered as any worth which is not difficult to work on it.
In calculating the mean of grouped data, grouped in classes of equal width, we may use the formula where a is the assumed mean. a must be one of the mid-points 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 a is the assumed mean. a must be one of the mid-points of the classes. Is the last statement correct? Justify your answer.