(Answered) Question refer to exercise assume that a preliminary sample

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Question: Refer to Exercise. Assume that a preliminary sample has shown that 63% of the adults in this city favor legalized casino gambling. How large should the sample size be so that the 95% confidence interval for the population proportion has a margin of error of .05?

Exercise: A large city with chronic economic problems is considering legalizing casino gambling. The city council wants to estimate the proportion of all adults in the city who favor legalized casino gambling. What is the most conservative estimate of the sample size that would limit the margin of error to be within .05 of the population proportion for a 95% confidence interval?

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