Question

The formula to find mean form a grouped frequency table is  bar X = A + (∑ f_i u_i / ∑ f_i) x g in the formula u_i =                 .

(A)  (x_i + A) / g

(B) (x_i - A)

(C) (x_i - A) / g

(D) (A - x_i) /g

Answer 1

 (C) (x_i - A) / g

u_i = d_i/g = (x_i - A)/g