Nearly one-half of Americans ages 25 to 29 are unmarried. How large a sample is necessary to estimate the true proportion of unmarried Americans in this age group within 2 percentage points with 95% confidence?

Q: y 24.31 4 21.82 22.63 6 22.54 7 21.35 8 20.06 18.47 10 18.98 11 18.29 12 16.3

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