How to Find the Minimum Sample Size with Unknown Proportion. [HD]

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United States Mr. Math Expert
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Determine the minimum sample size of men (21 or older) required to construct a 90% confidence interval to estimate the proportion of married men (21 or older), assuming a 0.05 margin of error.

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Tags:
Math
mathematics
word problem
probability
normal distribution
z score
Sampling Distribution
confidence interval
proportion