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A researcher conducts an experiment comparing three treatment conditions. The data consist of n=20 scores for each treatment condition.

1. A researcher conducts an experiment comparing three treatment conditions. The data consist of n=20 scores for each treatment condition.
a. If the researcher used an independent-measures design, then how many individuals were needed for the study and what are the df values for the F ratio?
b. If the researcher used a repeated-measures design, then how many individuals were needed for the study and what are the df values for the F ratio?

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