Because you already know about t tests, you might be wondering how a t value (which is always used for the test between the difference of the means for two groups) and an F value (which is always used for more than two groups) are related. As we mentioned earlier, an F value for two groups is equal to a t value for two groups squared, or F = t2. Handy trivia question, right? But also useful if you know one and need to know the other. And it shows that all of these inferential statistical procedures use the same strategy—compare an observed difference to a difference expected by chance alone.
