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2012 Nov 15
1
Compraring two independent samples
Hi, In my reading of pairing means of two independent samples, I read statements such as the standard error of the meanof X1 minus the mean of X2 is the square root of s1^2/n1+s2^2/n2. Then I read: "We could now derive the two independent samples confidence interval and test statistic. However, a problem arises in that the distribution of the test statistic (under the null hypothesis) will not be a t-distributio...