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Questions and answers by
Aniek Bradley
Answers (1)
X1 and X2 are the numbers of successes in samples 1 and 2, respectively. p = (140 + 43) / (200+50) = 183 /250 =0.73 z = (0.7-0.85) /√ (0.73)(1-0.73)(1/200 +1/50) = - 0.15 / √ (0.005) = -0.15 / 0.07 = -2.14 To have a proportional difference to be
