Q 1. In your own words, describe how can analyzing a ratio of variance can tell you about differences between group means. 2. If we had four groups for which we wanted to test hypotheses about group means with Oneway ANOVA, our null hypothesis is that ?1 = ?2 = ?3 = ?4. Does that tell us anything about which groups differ from significantly from which other (e.g., that group 1 is significantly different from group 3?) ? look carefully at the null hypothesis as you answer this. Another hint is to read the sections on planned contrasts and post-hoc comparisons in the chapter.

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