calculate variance by using variance formula which part of the equation is wrong if the a variable is zero, does this be true for the variance which part of the equation is wrong when using var,x? what is the correct answer to the question about variance? a simple question about variance which part of the calculation is wrong? which part of my calculation is wrong? what is the function of eqnarray how to find the correct variance what is the smallest variance what is the r in x what is the variance of a variable what is the equation to determine variance var(x) = cov(x) how do I figure out the concept of variance which part of the equation is wrong in excel r how to find the variance what's the variance of x mean what is the definition of variance