Find the critical value and testing for two independent samples
A paired difference experiment produced following results:
n0 = 45, x1 = 155, X2 = 157, xd = -2, sd = 55,
a) Establish the rejection region for the hypothesis Ho : mean D= 0 if Ha: mean D > 0. Use a = 0.01. z>__________
b) Conduct a paired difference test described above. The test statistic is?