When We Want to Compare More Than 2 Groups, We

Multiple Choice

When we want to compare more than 2 groups, we should use an ANOVA instead of a t-test because ______.

A) you cannot compare the means between all groups simultaneously with t-tests
B) you cannot take into account the variability for all samples with t-tests
C) you increase the chance of making a Type I error
D) all of these