The sum of the squares of deviation of 10 observations from their mean 50 is 250,then 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 sum of the squares of deviations for 10 observations taken from their means is 2.5, then write the value of standard deviation.

If the sum of the deviations of 50 observations from 30 is 50, then the mean of these observations is

The algebraic sum of deviations of 10 observations measured from 15 is 7 The mean is

Sum of squares of deviation of 10 observations measured from 5 is 17 and sum of squares ofobservations is 170 then mean of observation is

The standard deviation (sigma) of variate x is the square root of the A.M. of the squares of all deviations of x from the A.M. observations. If x_i//f_i , i=1,2,… n is a frequency distribution then sigma=sqrt(1/N Sigma_(i=1)^(n) f_i(x_i-barx)^2), N=Sigma_(i=1)^(n) f_i and variance is the square of standard deviation. Coefficient of dispersion is sigma/x and coefficient of variation is sigma/x xx 100 For a given distribution of marks mean is 35.16 and its standard deviation is 19.76 then coefficient of variation is

The standard deviation (sigma) of variate x is the square root of the A.M. of the squares of all deviations of x from the A.M. observations. If x_i//f_i , i=1,2,… n is a frequency distribution then sigma=sqrt(1/N Sigma_(i=1)^(n) f_i(x_i-barx)^2), N=Sigma_(i=1)^(n) f_i and variance is the square of standard deviation. Coefficient of dispersion is sigma/x and coefficient of variation is sigma/x xx 100 The standard deviation for the set of numbers 1,4,5,7,8 is 2.45 then coefficient of dispersion is

If the mean deviation from the median is 15 and median is 450, then find the coefficient of mean deviation.

Sum of the squares of deviation from the mean of x series is 136 and that of y series is 13. Sum of the product of the deviations of x and y series from their respective means is 122. Find the Pearson's coefficient of correlation.

The mean deviation from the mean for the set of observation -1, 0, 4 is