mean of 9 observation was found to be 35 Later on, it was detected that an observation 81 was - Maths - Statistics

Question

mean of 9 observation was found to be 35 Later on, it was detected
that an observation 81 was misread as 18 Find the correct mean of
the observation

Ankita Agarwal · Accepted Answer

Dear Student,

The mean of 9 observations was found to be 35Hence, sum of 9 observations  = 9×35 = 315Correct sum of observations should be =315+Difference between the correct and incorrect observationDifference = 81-18 = 63Correct sum of observations = 315+63 = 378Correct Average = 3789 = 42

Regards

mean of 9 observation was found to be 35. Later on, it was detected that an observation 81 was misread as 18 .Find the correct mean of the observation