The data below represents three different groups (Groups 1, 2 and 3) and represents scores on a depression questionnaire. We want to test for possible differences between these three groups using ANOVA. Group 1:  5 4 3 Group 2:  9 10 10 Group 3: 8 12 11 1. Calculate F.  2. Calculate the critical value. 3. Why would we run a post-hoc test? 4. What is the significance of a post-hoc test containing zero within the confidence intervals?

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