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

If sum_(i=1)^(9)(x_(i)-5)=9 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)^n (x_i -a) =n and sum_(i=1)^n (x_i - a)^2 =na then the standard deviation of variate x_i

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

STATEMENT-1: If sum_(i=1)^(9)(x_(i)-8)=9 and sum_(i=1)^(9)(x_(i)-8)^(2)=45 then s.D.~ of~ x_(1),x_(2),.....,x_(9), is 2. STATEMENT- 2: S.D.is independent of change of origin.

If sum_(i=1)^(10)(x_(i)-15)=12 and sum_(i=1)^(10)(x-15)^(2)=18 then the S.D.of observation x_(1),x_(2),x_(3),....x_(10) is:

In a group of data, there are n observations, x,x_(2), ..., x_(n)." If "sum_(i=1)^(n)(x_(i)+1)^(2)=9n and sum_(i=1)^(n)(x_(i)-1)^(2)=5n , the standard deviation of the data is

If sum_(i=1)^(n)sin x_(i)=n then sum_(i=1)^(n)cot x_(i)=