The mean of four observations is 3. If the sum of the squares of these observations is 48 then their standard deviation is

If the median and mode of 4 observations are 4,6 and the sum of square of the observation is 48, then standard deviations is

The mean of 40 observations 20 and their standard deviation is 5. If the sum of the square of the observations k, then the value of (k)/(1000) is

The mean of 40 observations 20 and their standard deviation is 5. If the sum of the square of the observations k, then the value of (k)/(1000) 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 , such the coefficient of variation of those observations 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

If standard deviation of a set of observation is 4 and if each of the observations is divided by 4, then the standard deviation of new set of observations 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 sum of the deviations of 50 observations from 30 is 50, then the mean of these observations is