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Answer :
The df-values for the F-ratio in this analysis are df between-groups = 3 and df within-groups = 42. The correct answer is option (a).
As per the question, there are four treatment conditions (k = 4) and 15 participants (n = 15).
The formula for calculating the degrees of freedom for the F-ratio in a repeated measures ANOVA is:
df between-groups = (k - 1)
df within-groups = (k - 1) × (n - 1)
Plugging in the values:
df between-groups = (4 - 1) = 3
df within-groups = (4 - 1) × (15 - 1)
= 3 × 14
= 42
Thus, df-values for the F-ratio in this analysis are df between-groups = 3 and df within-groups = 42.
The correct answer is (a) 2, 42.
Learn more about the ANOVA here:
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