2. We have a random sample of individuals across 3 groups of industries - education, technology, and service - and compare their yearly income with an ANOVA. We find an F-statistic large enough to reject the null that all groups have equal income. Given this test statistic, we can conclude that there is strong evidence every group has a different income from every other group. BOY OCT.08 3. With only 2 groups, we can use an ANOVA to test for mean differences across groups, and the square root of the F-statistic will be identical to the t-statistic if we had just run a t-test