Measures of Dis...

If mean of a series is 40 and variance 1486, then coefficient of variation is 

Mean deviation of the observations 70, 42, 63,34, 44, 54, 55, 46, 38, 48 from median is

The S.D. of the following frequency distribution is 

The sum of the squares of deviation of 10 observations from their mean 50 is 250, then coefficient of varition is

If the coefficient of variation and standard deviation of a distribution are 50% and 20 respectively, the its mean is

The coefficient of range of the following distribution $$10, 14, 11, 9, 8, 12, 6$$

The coefficient of mean deviation from median of observations  $$40, 62, 54, 90, 68, 76$$  is

The S.D. of the following freq. dist.

The mean of a dist. is $$4$$. if its coefficient of variation is $$58\%$$. Then the S.D. of the dist. is

The mean deviation from mean of observations 5, 10, 15, 20, ......85 is