In an analysis of variance with a between-groups population ...

[sjones]

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.

[kishoreddi]

Answer to Question 1

D

Answer to Question 2

D