Confidence interval for the difference between population proportions. (Assume that the samples are randomly selected and independent.) Sample statistics: n₁ = 1000, x₁ = 250, and n2 = 1200, x2 = 195; n1 x1 Construct a 98% confidence interval for the difference between population proportions P1 - P2 (1.516, 3.021) (0.047, 0.128) (0.581, 1.819) (-0.621, 0.781)

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