Let `x_(1),x_(2)......x_(n)` be n observations such that `Sigma x_(i)^(2)=200` and `Sigma x_(1)=40` then a possible value of n among the following is

Let x_(1), x_(2),…..,x_(3) be n observations such that Sigmax_(i)^(2)=300 and Sigmax_(1)=90 . Then a possible value of n among the following is

Let x_(1),x_(2),…x_(n) be n observations such that Sigmax_(i)^(2)=500 and Sigmax_(1)=100 . Then, an impossible value of n among the following is

Let x_(1), x_(2),…,x_(n) be n observations such that sum x_(i)^(2) = 400 and sum x_(i) = 80 . Then a possible value of n among the following is

Let x_(1), x_(2),….,x_(n) be n observation such that sum(x_(i))^(2)=400 and sumx_(i)=40 , then a possible value of n among the following is

If x_1, x_2, .....x_n are n observations such that sum_(i=1)^n (x_i)^2=400 and sum_(i=1)^n x_i=100 then possible values of n among the following is

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.

If x_1,x_2,.......,x_n are n values of a variable X such that sum_(i=1)^n (x_i-2)=110 and sum_(i=1)^n(x_i-5) =20 . Find the value of n and the mean.

For a sample size of 10 observations x_(1), x_(2),...... x_(10) , if Sigma_(i=1)^(10)(x_(i)-5)^(2)=350 and Sigma_(i=1)^(10)(x_(i)-2)=60 , then the variance of x_(i) is

Let x_(1),x_(2),……,x_(n) be n observations and barx be their arithmetic mean. The formula for the standard deviation is

If x_(1),x_(2)……..x_(n) be n observation and barx be their arithmetic mean .Then formula of the standard deviation is given by