ANOVA is used to compare the means of more than two groups. Fisher’s one-way ANOVA and Tukey’s one-way ANOVA are similar tests. In Dunnett’s test, the control group serves as a reference or ...

For example, suppose A and B each have two levels. Then, if you use the following statements proc anova; class A B; model Y=A B A*B; means A B / tukey; means A*B; run; produces the same results.

which follows the ANOVA table in Figure 10.7, represents the proportion of variability accounted for by the independent variable. Approximately 28% of the variability in the ozone level can be ...