SOLUTION: A recent poll found that out of a sample of 500 random, independent people 381 are making an effort to recycle at home. 7. Find a 90% confidence interval for the population pr

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Question 467824: A recent poll found that out of a sample of 500 random, independent people 381 are making an effort to recycle at home.
7. Find a 90% confidence interval for the population proportion.
A. 0.738 < p < 0.786
B. 0.731 < p < 0.793
C. -0.138 < p < 1.662
D. Not possible due to the Success/Failure requirement
E. none of these


Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
B. 0.731 < p < 0.793 .


p+%2B-+1.645%2Asqrt%28%28p%2Aq%29%2Fn%29, where p = 381/500 = 0.762, q = 1 - 0.762 = 0.238, and n = 500.