ANOVA_Review_Sheet

# ANOVA_Review_Sheet - ANOVA Review Sheet(use alpha=.05...

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ANOVA Review Sheet ***( use alpha=.05 throughout )*** 1. The following data represent scores from an experiment with one independent variable that has four levels or conditions. Each subject served in one condition only. A one-way ANOVA was conducted to determine whether the group means differ significantly. State the null and alternative hypotheses. From the source table, interpret the calculated and critical F values, and state a conclusion in words. A B C D 2 5 8 5 3 4 7 6 2 5 9 4 4 6 8 7 5 7 9 6 3 6 7 5 Anova: Single Factor SUMMARY Groups Count Sum Average Variance A 6 19 3.167 1.367 B 6 33 5.5 1.1 C 6 48 8 0.8 D 6 33 5.5 1.1 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 70.125 3 23.375 21.41221 1.86E-06 3.098 Within Groups 21.833 20 1.092 Total 91.958 23 Refer to the following source table for questions 2-6. 2. Complete the source table: Source SS df MS F Between Groups 85 5 Error (within groups) 23 44 _______________________________________________________________ Total 108 49

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3. What is the critical F? _____________ 4. Draw the appropriate conclusions: _______________________________ _____________________________________________________________ 5. How many groups (conditions) were there in this experiment? _________ 6. How many subjects were in this experiment? _____________
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