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One of the primary advantages of a repeatedmeasures design compared

One of the primary advantages of a repeatedmeasures design, compared to independent-measures, is that it reduces the overall variability by removing variance caused by individual differences. The following data are from a research study comparing two treatment conditions.

a. Assume that the data are from an independentmeasures study using two separate samples, each with n = 6 participants. Compute the pooled variance and the estimated standard error for the mean difference.

b. Now assume that the data are from a repeatedmeasures study using the same sample of n = 6 participants in both treatment conditions. Compute the variance for the sample of difference scores and the estimated standard error for the mean difference.

a. Assume that the data are from an independentmeasures study using two separate samples, each with n = 6 participants. Compute the pooled variance and the estimated standard error for the mean difference.

b. Now assume that the data are from a repeatedmeasures study using the same sample of n = 6 participants in both treatment conditions. Compute the variance for the sample of difference scores and the estimated standard error for the mean difference.

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