The algebraic sum of the deviations of a set of n values from their mean is (a) `0` (b) `n-1` (c) `n` (d) `n+1`

The algebraic sum of the deviations of a set of n values form their mean is

The algebraic sum of the deviations of a set of n values from their mean is 0( b ) n-1 (c) n (d) n+1

The sums of the deviations of a set of n values x_(1),x_(2),..,x_(n) measured from 15 and -3 are -90 and 54 respectively.Find the value of n and mean.

The sums of the deviations of a set of n values x_1, x_2,ddot,x_n measured from 15 and -3a r e-90 and 54 respectively. Find the value of n and mean.

The sum of the deviations of a set of n values x_(1),x_(2),.......x_(n) measured from 50 is -10 and the sum of deviations of the values from 46 is 70. Find the values of n and the mean.

The sum of the deviations of a set of n values x_1, x_2 ,.........x_n measured from 50 is-10 and the sum of deviations of the values from 46 is 70.Find the values of n and the mean.

The arithmetic mean of 1,2,3,...n is (a) (n+1)/2 (b) (n-1)/2 (c) n/2 (d) n/2+1

The arithmetic mean of 1,2,3,...n is (a) (n+1)/2 (b) (n-1)/2 (c) n/2 (d) n/2+1

The mean deviation of the series a , a+d , a+2d ,.....,a+2n from its mean is (a) ((n+1)d)/(2n+1) (b) (n d)/(2n+1) (c) (n(n+1)d)/(2n+1) (d) ((2n+1)d)/(n(n+1))