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April 2, 2015

Homework Help: statistics

Posted by Anonymous on Monday, December 10, 2012 at 5:33pm.

We take a simple random sample of 100 people and check their ages. Out of the 100, 15 are 65. What is the probability that the proportion of people over 65 in the entire population is between 13% and 17%? What error range can we guarantee with 90% certainty?

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