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An article reports that out of 10520 surgeries, 859 resulted in complications within six months of surgery
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math   Statistics-And-Probability   
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Answer #1

x = 859 p 859/10520-0.082 Part a) 95% confidence level Z-1.96 Formula psqrt(p (1-p)/n), p sqrt(p (1-p)/n) 0.082 1.96*sqrt(0.082*0.918/10520), 0.082+ 1.92*sqrt(0.082*0.918/10520) 0.076757 0.087243 0.077, 0.087 Part b) 99% , z-2.58 0.082-2.58*sqrt(0.082*0.918/10520) 0.082+2.58 sqrt(0.082*0.918/10520) 0.075099 0.088901 0.075,0.089

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