Use the following sample information to construct a 90% confidence interval for the difference in the two

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Use the following sample information to construct a 90% confidence interval for the difference in the two population means.

Sample 1 ...Sample 2

n1 = 32 ..... n2 = 31

x̄1 = 70.4 ...x̄2 = 68.7

σ21 = 5.76 .... σ22 = 6.1


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