Full_Name: Matthew Davis Version: 2.2.0 OS: OS X (10.4.5) Submission from: (NULL) (209.107.120.195) the mean of my sample x is 0.2, and when I check mean(x)<=0.2 I get a TRUE value, when I check mean(x)<=(1-0.8) I get a FALSE value. (x <- c(0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0))