Hi: I apologize for posting in the R listserv. But I am trying to do the following in R. I am trying to construct Bivariate 95% Approximate Confidence interval for the mean vector p=(p1,p2) similar to what we have in the univariate case. [image: \hat p \pm z_{1 - \frac{1}{2}\alpha} \sqrt{\frac{1}{n}\hat p \left(1 - \hat p \right)}] Should I be using bivariate tolerance region instead? Any thoughts? Thanks Anamika [[alternative HTML version deleted]]