SOLUTION: When 347 college students are randomly selected and surveyed, it is found that 117 own a car. Find a 99% confidence interval for the true proportion of all college students who own
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Question 1162839: When 347 college students are randomly selected and surveyed, it is found that 117 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
half-interval for 99% CI is z(0.995)*sqrt (p(1-p)/n), where p=117/347 or 0.337
z is 2.576
sqrt term is 0.0254
half-interval is that product or 0.0654
add to and subtract that from mean
(0.272, 0.402)
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