Question

1.Construct the confidence interval for μ 1 − μ 2 for the level of confidence and the data from independent samples given. 95% confidence: n 1 = 110, x - 1 = 77, s 1 = 15 n 2 = 85, x - 2 = 79, s 2 = 21 90% confidence: n 1 = 65, x - 1 = − 83, s 1 = 12 n 2 = 65, x - 2 = − 74, s 2 = 8

2. Construct the confidence interval for μ 1 − μ 2 for the level of confidence and the data from independent samples given. 99.9% confidence: n 1 = 275, x - 1 = 70.2, s 1 = 1.5 n 2 = 325, x - 2 = 63.4, s 2 = 1.1 90% confidence: n 1 = 120, x - 1 = 35.5, s 1 = 0.75 n 2 = 146, x - 2 = 29.6, s 2 = 0.80

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