If for distribution `sum(x-7)=3`, `sum(x-7)^(2)=57` and total number of item is `20`. Find the mean and standard deviation.

If for a distribution, sum (x-5)=3, sum (x-5)^(2)=43 and total number of observations is 18, find the mean and standard deviation.

Find the binomial distribution whose mean is 10 and standard deviation is 2sqrt(2)

If X ~ B (n,p) such that 4P (X=4) =P(x=2) and n=6 . Find the distribution mean and standard deviation .

If X X-B(n,p)such that 4P(X=4)=P(X=2)and n=6 find distribution mean and standard deviation

The mean and standard deviation of 10 observations are found to be 10 and 4 respectively. Later it was found that one item is mistaken as 10 instead of 12. Find the correct mean and standard deviation.

Let X denote the sum of the numbers obtained when two fair dice are rolled. Find the variance and standard deviation of X.

If mean =0 standard deviation =2 Then E(X^(2)) is