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Find the critical value, t0, to test the claim that the mean1>mean 2. Two samples are randomly selected and come from populations that are normal. The sample statistics are given below. Assume that standard deviation 2/1 is not equal standard deviation 2/2. Use alpha

=0.01.

N1=18 n2=13

x1=790 X2=775

s1=40 s2=25.

A. 2.179

B. 2.681

C. 3.055

d. 1.699

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