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We would like to construct a confidence interval for some population proportion p. For which of the following combinations of confidence level, sample proportion and

We would like to construct a confidence interval for some population proportion p. For which of the following combinations of confidence level, sample proportion and sample size will the interval be the most narrow? 90% confidence, n = 350, p-hat= 0.20 99% confidence, n = 250, p-hat = 0.20 90% confidence, n = 350, p-hat = 0.40 99% confidence, n = 350, p-hat= 0.40 90% confidence, n = 250, p-hat= 0.40

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