Description
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
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Explanation & Answer
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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
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