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 s2 = 8, and the second treatment had M = 52 and s2 = 8. Do these data indicate a significant difference between the two treatments? (α = .05)
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The formula for the standard error of the difference between the means in an independent measures design is: SE = sqrt((s1^2 / n1) + (s2^2 / n2)) Where s1 and s2 are the variances of the two groups, and n1 and n2 are the sample sizes. Plugging in the Show more…
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