In a test to compare the average LSAT (Law School Admission Test) scores for students who took one of three different prep courses for the exam, three samples of 21 students each were randomly selected to represent the three populations of students. The partially completed tables below summarize test score results. Fill in the indicated missing values. Do sample results provide sufficient evidence to reject a €œno difference in mean LSAT scores€ for the three populations of students represented? The significance level is 5%. Explain your reasoning.

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SUMMARY Groups Course A Course B Course C Sample size Average 21 21 21 597.1 583.8 613.8 Variance 1381.429 1634.762 1994.762 ANOVA Source of Variation SS Between Groups Within Groups 100219.0 60 (b) Total df MS F P-value F crit 9488.9 2 a) (c () (e) 10707.9 62