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(Circle your answer) 3) Test the hypothesis Ho: /4 = / at a = 0.05, two-tailed. Two samples are randomly selected from normal populations with the following sample statistics: (Ch 1 1) n1 = 25 n 2 = 30 X = 29 X 2 = 27 S1 = 1.5 S2 = 1.9 a) Find toy, = [2] b) Find to = X1 - X2 [1] s? , 5 2 m n2 c) Make a decision: [1]