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 deviations of a set of values x_(1), x_(2), x_(3), …… x_(n) measured from 50 is -10 and the sum of deviations of the values from 46 is 70. Find the value of n and the mean.

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 means and variance of n observations x_(1),x_(2),x_(3),…x_(n) are 0 and 5 respectively. If sum_(i=1)^(n) x_(i)^(2) = 400 , then find the value of n

Mean deviation for n observation x_(1),x_(2),…..x_(n) from their mean bar x is given by

If x1, x2, x3,....xn are n values of a variable X such that Find the value of n and the mean.

The standard deviation of n observations x_(1), x_(2), x_(3),…x_(n) is 2. If sum_(i=1)^(n) x_(i)^(2) = 100 and sum_(i=1)^(n) x_(i) = 20 show the values of n are 5 or 20

If x_(1), x_(2), ………,x_(n) are n values of a variable x such that sum(x_(i)-3) = 170 and sum(x_(i)-6) = 50. Find the value of n and the mean of n values.

The mean square deviation of a set of observation x_(1), x_(2)……x_(n) about a point m is defined as (1)/(n)Sigma_(i=1)^(n)(x_(i)-m)^(2) . If the mean square deviation about -1 and 1 of a set of observation are 7 and 3 respectively. The standard deviation of those observations is

If the standard deviation of n observation x_(1), x_(2),…….,x_(n) is 5 and for another set of n observation y_(1), y_(2),………., y_(n) is 4, then the standard deviation of n observation x_(1)-y_(1), x_(2)-y_(2),………….,x_(n)-y_(n) is