Question: Determine the overall sample size required so that a 95% upper bound confidence interval for the difference of two proportions will have a margin of

Determine the overall sample size required so that a 95% upper bound confidence interval for the difference of two proportions will have a margin of error of ???????? = 0.04 when

(a) ????̇ ???? = 0.65 and ????̇ ???? = 0.50.

(b) ????̇ ???? = 0.40 and ????̇ ???? = 0.80.

(c) ????̇ ???? = 0.10 and ????̇ ???? = 0.30.

(d) no prior knowledge of the proportions is available.

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