Question: An independent-measures research study was used to compare two treatment conditions with n = 12 participants in each treatment. The first treatment had a mean of M = 55 with a variance of s 2 = 8, and the second treatment had M = 52 and s 2 = 4. Do these data indicate a significant difference between the two treatments? Use a two-tailed test with α = .05.

( Note: Because the two samples are the same size, the pooled variance is simply the average of the two sample variances.)

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