T-Test v3.0

Paul Barrett has released a new version of his t-test program. This is a very natty little program - you give it the means and SDs of two groups, it calculates t and p (both assuming and not assuming homogeneity of variance) Cohen's d and eta-squared. I use it a lot for looking at data from reported studies - either because they didn't provide an exact p-value, or because I don't trust the p-value that they gave.