A data consists of n observations : `x_(1), x_(2),……, x_(n)`. If `Sigma_(i=1)^(n)(x_(i)+1)^(2)=11n and Sigma_(i=1)^(n)(x_(i)-1)^(2)=7n`, then the variance of this data is

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

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

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

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

The standard deviation of n observations x_(1),x_(2),......,x_(n) is 2. If sum_(i=1)^(n)x_(i)=20 and sum_(i=1)^(n)x_(i)^(2)=100 then n is

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)^(2) = 20 show the values of n are 5 or 20

The standard deviation of n obervations x_(1),x_(2).....,x_(n) is 2. If sum_(i=1)^(n)x_(i)=20andsum_(i=1)^(n)x_(i)^(2)=100 , then n is

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

The standard deviation of n observations x_(1), x_(2), …, x_(n) is 2. If sum_(i=1)^(n)x_(i)=20 and sum_(i=1)^(n)x_(i)""^(2)=100 , then n is : a) 10 or 20 b) 5 or 10 c)5 or 20 d) 5 or 15