Measures of Dis...

Mean deviations of the series $$a,a+d,a+2d,...,a+2nd$$ from its mean is 

The mean of a distribution is 4. If its coefficient of variation is 58%. Then the S.D. of the distribution is

Standard deviation of the distribution $$1, 3, 5,....., 13$$ will be

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

For the given data, SD = 10, AM = 20, the coefficient
of variation is____

For the given data, SD $$= 10$$, AM $$= 20$$ the coefficient of variation is ...........

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

Consider the following groups A and B
A : 3, 4, 5,...... upto n terms
B : 15, 19, 23,..... upto n terms
If the mean deviations of groups A and B about their means are $$\displaystyle \alpha \: \: \: and\: \: \: \beta  $$ respectively then

Find the mean for the following data using step deviation method.

Find the mean for the following data using step deviation method.