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Consider the hypothesis test H0: 1 = 2 against H1: 1 2. Suppose that the sample sizes are n1 = 14 and n2 = 14,

Consider the hypothesis test H0: 1 = 2 against H1: 1 2. Suppose that the sample sizes are n1 = 14 and n2 = 14, that and and that and . Assume that 1 = 4.0 2 = 7.1 21 = 4.2 22 = 6.0 and that data are drawn from normal distributions. Use = 0.05.21 = 22 (a) Test the hypothesis and find the P-value. (b) Explain how the test could be conducted with a confidence interval.

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