In the formula x̄ = A + \(\frac{\sum f_i d_i}{\sum f_i}\) for finding the mean of grouped data d-s are deviations from A of:
A. lower limits of the classes
B. upper limits of the classes
C. mid point of classes
D. frequencies of the class marks.
Answer:C
In the formula x̄ = A + \(\frac{\sum f_i d_i}{\sum f_i}\) for finding the mean of grouped data d-s are deviations from A of:
A. lower limits of the classes B. upper limits of the classes C. mid point of classes D. frequencies of the class marks.