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

Determine the binomial distribution whose mean is 10 and whose standard deviation is 8.

Determine the binomial distribution whose mean is 10 and whose standard deviation is 2sqrt2 .

From a frequency distribution consisting of 18 observations, the mean and the standard deviation were found to be 7 and 4 respectively. But on comparison with the original data, it was found that a figure 12 was miscopied as 21 in calculations. Calculate the correct mean and standard deviation.

If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately

Calculate the mean and the standard deviation for the following distribution:

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :