If the sum of the squares of deviations for 10 observations taken from their means is 2.5, then write the value of standard deviation.

The sum of the squares of deviations for 10 observations taken from their mean 50 is 250. 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

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

The sum of squares of deviations of 10 observations taken from the mean 50 is 250 The coefficient of variation is

If the sum of the squares of the deviations of 25 observations taken from the mean 40 is 900, then the coefficient of variation is

If the sum of the squares of the deviations of 25 observation taken from the mean 40 is 900, then the coefficient of variation is-

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

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

If the mean of 10 observations is 50 and the sum of the squares of the deviations of the observations from the mean is 250, then the coefficient of variation of those observations is