mean of 50 obs was found to be 80 4 but later on it was found that 96 was - Maths - Statistics

Question

mean of 50 obs was found to be 80 4 but later on it was found
that 96 was misread as 69 at one place find the correct mean

Aakash Sharma · Accepted Answer

Given: Mean of 50 observations = 80 4
â‡’
Sum of 50 observations = 80 4 Ã— 50 = 4020

Now Actual sum = sum
of 50 observations + correct observation â€“
Incorrect observation
= 4020 + 96
â€“ 69 = 4047

mean of 50 obs. was found to be 80.4 but later on it was found that 96 was misread as 69 at one place . find the correct mean