In an analysis of variance with a between-groups population variance estimate of 30 and a within-groups estimate of 25, the F ratio is
A) 25 / (3025) = 5.00
B) (3025) /30 = 0.17
C) 25/30 = 0.83
D) 30/25 = 1.20
Question 2
Ann conducts a study, and finds that the estimated population variances for the groups are 12.8, 16.3, 15.1, and 19.9. What is the within-groups estimate of the population variance?
A) (12.82 + 16.32 + 15.12 + 19.92) / (4 1) = 351.18.
B) (12.82 + 16.32 + 15.12 + 19.92) / 4 = 263.39.
C) (12.8 + 16.3 + 15.1 + 19.9) / (4 1) = 21.37.
D) (12.8 + 16.3 + 15.1 + 19.9) / 4 = 16.03.
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