# Question: An urban economist wishes to estimate the proportion of Americans

An urban economist wishes to estimate the proportion of Americans who own their homes. What size sample should be obtained if he wishes the estimate to be within 0.02 with 90% conﬁdence if

(a) he uses a 2010 estimate of 0.669 obtained from the U.S Census Bureau?

(b) he does not use any prior estimates?

(a) he uses a 2010 estimate of 0.669 obtained from the U.S Census Bureau?

(b) he does not use any prior estimates?

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