A study investigated the effects of physical fatigue on the performance of professional tennis players. Researchers measured the number of unforced errors committed by a random sample of 12 professional tennis players during the first three sets of a match. They hypothesized that increased fatigue would be associated with a greater number of errors. The following is an F table for this hypothetical study using the one-way within-subjects ANOVA.

(a) Complete the F table and make a decision to retain or reject the null hypothesis.
(b) Estimate effect size using partial omega-squared: ω2P.

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Source of Variation Between groups 12 3 ween persons Within groups (error) Total Bet