Question: Determine the overall sample size required so that a 95% confidence interval for the difference of two proportions (i.e., ????????????????) will have a margin of

Determine the overall sample size required so that a 95% confidence interval for the difference of two proportions (i.e., ????????−????????) will have a margin of error of???????? = 0.03 when

(a) ????̇ ???? = 0.55 and ????̇ ???? = 0.60.

(b) ????̇ ???? = 0.12 and ????̇ ???? = 0.15.

(c) ????̇ ???? = 0.75 and ????̇ ???? = 0.90.

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

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