Question

The mean of 5 observations was calculated as 145, but it was later on detected that one observation was misread as 45 in place of 25. Find the correct mean of observations. Plz give it in detail.

Answer 1

141 is the new mean.
See the photo for more detail.

Answer 2

Answer:

Mean = Sum of observations/Total number of observations

145 = Sum/5

Sum = 145 x 5 = 725

Now correct sum = 725 - 45 + 25

= 705

Correct mean = 705/5 = 141

Hope This Helps You!