SOLUTION: 71% of 111 delegates in a political convention favored changing the rules to restrict the number of potential candidates. What is the 95% confidence interval for the population pro

Question 1195600: 71% of 111 delegates in a political convention favored changing the rules to restrict the number of potential candidates. What is the 95% confidence interval for the population proportion.
Give your answers as decimals, to two places.
_____< p < _____

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
95% half interval is z(SE)=1.96*sqrt(0.6396*0.3604)/111=z*0.0456=0.0893
Exact SE is sqrt ((71/111)(40/111)/111), but it's the same here.
the point estimate is 0.6396
the interval is (0.5503, 0.7289) or (0.55 ,0.73) or 0.55 < p < 0.73
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