You want to compare average life expectancy (in years) across three types of communities: rural, sub-urban, and urban. If your ANOVA F statistic is significant, how do you know which communities live significantly longer than each other? For example, do rural communities live significantly longer than urban or sub-urban communities, or is there another combination? You want to compare average life expectancy (in years) across three types of communities: rural, sub-urban, and urban. If your ANOVA F statistic is significant, how do you know which communities live significantly longer than each other? For example, do rural communities live significantly longer than urban or sub-urban communities, or is there another combination? Control for covariates. Compare the mean differences side by side with a Tukey's post hoc test. Determine if r is positive or negative. Interpret the odds ratios