Two samples are taken with the following sample means, sizes, and standard deviations T1 = 28 ã2 = 22 nį = 67 n2 = 69 s1 = 3 s2 = 4 Estimate the difference in population means using a 89% confidence level. Use a calculator, and do NOT pool the sample variances. Round answers to the nearest hundredth. < li - 12

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