In a random sample of 200 females and 100 males who watched a certain television program, 94 females and 34 males indicated they like it. A 95% confidence interval for the difference in proportions of all females and all males who watched the programme and liked it can be calculated with:    A. p1 – p2 ± X1/n1 – X2/n2  B. p1 – p2 ± Zα/2 (X1/n1 – X2/n2)  C. p1 – p2 ± Zα/2 √ X1/n1 + X2/n2  D. p1 – p2 ± Zα/2 √ X1/n1 (1 - X1/n1) + X2/n2 (1 - X2/n2)  E. None of the preceding

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