Question

Mean of 50 observations was found to be 80.4. But later on, it was discovered that 96 was misread as 69 at one place. Find the correct mean.

Answer 1

Given, the mean of 50 observations = 80.4

∴ Sum of 50 observations = 80.4 x 50 = 4020 

But later, we observe that 96 was misread as 69 at one place.