If `underset(i=1)overset(9)sum (x_(i)-5) " and" underset(i=1)overset(9)sum (x_(i)-5)^(2)=45`, then the standard deviation of the 9 items `x_(1),x_(2),..,x_(9)` is

If sum_(i=1)^(9) (x_(i)-5) " and" sum__(i=1)^(9) (x_(i)-5)^(2)=45 , then the standard deviation of the 9 items x_(1),x_(2),..,x_(9) is

If sum_(i=1)^(5) (x_(i) - 6) = 5 and sum_(i=1)^(5)(x_(i)-6)^(2) = 25 , then the standard deviation of observations

If sum_(i=1)^(18)(x_(i) - 8) = 9 and sum_(i=1)^(18)(x_(i) - 8)^(2) = 45 then find the standard deviation of x_(1), x_(2),….x_(18)

overset(10)underset(i=3)sum5

A data consists of n observations x_(1), x_(2), ..., x_(n). If Sigma_(i=1)^(n) (x_(i) + 1)^(2) = 9n and Sigma_(i=1)^(n) (x_(i) - 1)^(2) = 5n , then the standard deviation of this data is

If x_(1), x_(2), "…......." x_(18) are observation such that sum_(j=1)^(18)(x_(j) -8) = 9 and sum_(j=1)^(18)(x_(j) -8)^(2) = 45 , then the standard deviation of these observations is

Let x_(1) lt x_(2) lt x_(3) lt x_(4) lt x_(5) and y_(1) lt y_(2) lt y_(3) lt y_(4) lt y_(5) are in AP such that underset(I = 1)overset(5)(sum) x_(i) = underset(I = 1)overset(5)(sum) y_(i) = 25 and underset(I =1)overset(5)(II) x_(i) = underset(I = 1)overset(5)(II) y_(i) = 0 then |y_(5) - x_(5)| A. 5//2 B. 5 C. 10 D. 15

If for distribution of 18 observations sum(x_i-5)=3a n dsum(x_i-5)^2=43 , find the mean and standard deviation.

If for distribution of 18 observations sum(x_i-5)=3a n dsum(x_i-5)^2=43 , find the mean and standard deviation.

The integral underset(1)overset(5)int x^(2)dx is equal to