In looking through Excel I see that it has both the ANOVA procedure and a
t-test with equal variances and a t-test for unequal variances. One of the
assumptions that is made in both the "standard t test" and ANOVA is that the
variances are equal. Yet, Excel seems to have no test for homoscedasicity
(oh what a cool word). How do you know these procedures are ok to use if you
have not checked the assumption of equal variances?