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One-Way ANOVA Exam Practice - Discovering Statistics

C8057 (Research Methods II): One-Way ANOVA Exam Practice Dr. Andy Field Page 1 4/18/2007 One-Way Independent ANOVA : Exam Practice Sheet Questions Question 1 Students were given different drug treatments before revising for their exams . Some were given a memory drug, some a placebo drug and some no treatment. The exam scores (%) are shown below for the three different groups: Memory DrugPlaceboNo MeanGrand Carry out a One-Way ANOVA by hand to test the hypothesis that the treatments will have different effects. Can you suggest some follow-up comparisons (with weights)? Question 2 A neuropsychologist was interested in how Monkeys learn to perform a task. The task was to retrieve a coconut from the opposite side of a river.

C8057 (Research Methods II): One-Way ANOVA Exam Practice Dr. Andy Field Page 6 4/18/2007 ANOVA Serotonin Level 151.749 3 50.583 10.588 .000 109.881 23 4.777 261.630 26 Between Groups Within Groups Total Sum of Squares df Mean Square F Sig. Contrasts could be (weights in brackets):

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