# SOLUTION: The Pizza Shop wanted to determine what proportion of its customers ordered only cheese pizza. Out of 80 customers surveyed, 15 ordered cheese pizza. What is the 99% confidence int

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 Question 479410: The Pizza Shop wanted to determine what proportion of its customers ordered only cheese pizza. Out of 80 customers surveyed, 15 ordered cheese pizza. What is the 99% confidence interval of the true proportion of customers who order only cheese pizza? Answer by edjones(7794)   (Show Source): You can put this solution on YOUR website!p=15/80=.1875, q=.8125, (a,b)=.1875 +-(2.576*.0436) [2.576 is the area under the normal curve for the 99% confidence level.] =.1875 +-.1123 =(.2998, .0752) the 99% confidence interval of the true proportion of customers who order only cheese pizza.