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    Statistics & probability: comparison of two binomial proportions

    Case #1: x1 = 121, n1 = 160, p1 = 121/160 = 0.75625 Case #2: x2 = 52, n2 = 100, p2 = 52/100 = 0.52 [symbols have usual meanings; 90% confidence interval to be used] Qn: Estimate the difference between the two proportions - show steps clearly, give a one sentence interpretation.