construct a confidence interval 11

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Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.

 n = 110, x = 68; 88% confidence
Jul 10th, 2015

Thank you for the opportunity to help you with your question!

the estimate of p is p= 68/110= 0.618

std = sqrt(0.618*(1-0.618)/110) = 0.0463

for 88% confidence of interval k = 1.555

thus CI is 

-1.555*0.0463<mu-0.618<1.555*0.0463 

0.546 <mu<0.690


Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 10th, 2015

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Jul 10th, 2015
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