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# Independent Measures Comparing Three Treatment Conditions

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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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This solution contains instructions to compare the independent variables in three treatment conditions.

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Hi,
OK, so you have three treatments: A, B, and C.
Each of those treatments needs 20 scores.

If you're doing an independent measures design, that means you have different people in each condition, so you would need 3(treatments)x20(scores)=60 people.

If you're doing a repeated measures design, assuming that each person is is completing each of the three treatments, you only ...

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