Coefficient of variation of two distributions are 60 and 70 and their standard deviations are 21 and 16 respectively.What are their arithmetic means?

Find the bionomial distribution whose mean is 10 and standard deviation 2sqrt2

If in the frequency distribution,the mean and median are 21 and 22 respectively,then find its mode.

In a binominal distribution mean is 6 and standard deviation is sqrt2 .What is the number of trials.

The mean and variance of a binomial distribution are 8and 4 respectively. What is P(X=1)?

A student obtained the mean and standard deviation of 100 observations as 40 and 5.1 respectively . It was later found that one observation was wrongly copied as 50, the correct figure being 40. Find the correct mean and S.D.

Calculate mean , variance and standard deviation for the following distribution.

Suppose that mean and standard deviation of 6 observations are 8 and 4 respectively . Let each observation be multiplied by 3 Find the standard deviation of the resulting observations.

Suppose that mean and standard deviation of 6 observations are 8 and 4 respectively . Let each observation be multiplied by 3. Find the new mean of the resulting observations