In an experiment with 15 observations on x, the following results were available `Sigma x^(2)=2830 , Sigma x=170` On observation that was 20, was found to be wrong and was replaced by the correct value 30. Then, the corrected variance is

In an experiment with 9 observation on x , the following results are available Sigmax^(2)=360 and Sigma x=34 . One observation that was 8, was found to be wrong and was replaced by the correct value 10, then the corrected variance is

In an experiment with 15 observations of x the following results were available sum x^2=2830 sum x=170 one observation that was 20 was found to be wrong and it was replaced by its correct value of 30 Then the corrected variance is (1) 8.33 (2) 78 (3) 188.66 (4) 177.33

In an experiment with 10 observations on x the following results are available Sigmax^(2)=354 and Sigma x=58 . If one observation 8 that was found to be wrong and was replaced by the corrected value 10, then the corrected variance is

In an experiment with 15 observations the results obtained were Sigma x^(2)=2830 and Sigma x=170 .Later on,one observation with value 20 was found wrong and was replaced by the correct value 30 .Find the corrected variance.

In an experiment with 10 observations on x, Sigma x=60 , Sigma x^(2)=1000 one observation that was 20 was found to be wrong and was replaced by the correct value 30 then the corrected variance is

The mean of 20 observation is 12. On checking, it was found that two observation were wrongly copied as 3 and 6. If wrong observation are replaced by correct values 8 and 4, then the correct mean is

The mean of 20 observations is 17. On checking it was found that the two observations were wrongly copied as 3 and 6. If wrong observations are replaced by correct values 8 and 9, then what is the correct mean ?

Mean and variance of 20 observation are 10 and 4. It was found, that in place of 11, 9 was taken by mistake find correct variance.

Mean of 20 observations is 15.5. Later on it was found that the observation 24 was taken as 42. The correct mean is-