Multiple t-tests in Excel adjusting for Type 1 error HD

This video describes how to run multiple t-tests in Excel looking for differences between more than two groups and adjusting for Type 1 errors. Normally, a t-test is limited to testing for differences between two groups. When looking for differences between more than two groups an ANOVA test is used. However, when running an ANOVA in Excel you are unable to run a post hoc test to determine which group is different from which. An ANOVA only tells you whether or not there is a difference between any of the groups being tested. Running multiple t-tests using the Bonferroni correction to adjust for Type 1 error is a way to work around this limitation when using Excel for testing multiple groups.