If standard deviation of a given data is 5 and mean is 50 then coefficient of variation (C.V) is equal to a)100 b)0 c)1 d) 10

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

If standard deviation of variate x_(i) is 10, thenvariance of the variate (50+5x_(i)) will be

If the mean of 10 observation is 50 and the sum of the square of the deviations of observation from the mean is 250, then the coefficient of variation of these observation is

Calculate standard deviation and the coefficient of standard deviation, given the following data: