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Question Description

Examine the following ANOVA summary table:


Source   SS                        df                           MS                                   F

Between 495.34                  4                           123.84                             8.16

Within      682.56                45                           15.17

Total        1,177.90               49


  1. How many groups were there in the study?
  2. Assuming equal numbers of subjects per group, how many subjects were in each group?

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Final Answer

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Since between has 4 degrees of freedom, there are 5 groups.

Since the total has 49 degrees of freedom, the total number of observations is 50

Thus there are 5 groups each group having 10 observations each.

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madhavant (2757)
Boston College

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