Question

While calculating the mean of a given data by the assumed-mean method, the following values were obtained.

`A = 25, sum f_i d_i = 110, sum f_i = 50`.

Find the mean.

Answer 1

According to assumed-mean method,
𝑥̅ = 𝐴 +`(sum_i f_i d_i)/(sum _i f_i)`
= 25 +`110/50`
= 25 + 2.2
= 27.2
Thus, mean is 27.2.