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Question 7 12 pts An economist wants to know if the proportion of the U.S. population who commutes to work via carpoolin
Posted: Wed May 11, 2022 12:37 pm
by answerhappygod
- Question 7 12 Pts An Economist Wants To Know If The Proportion Of The U S Population Who Commutes To Work Via Carpoolin 1 (144.97 KiB) Viewed 18 times
Question 7 12 pts An economist wants to know if the proportion of the U.S. population who commutes to work via carpooling is on the rise. What size sample should be obtained if the economist wants an estimate within 2 percentage points of the true proportion with 90% confidence if: (a) the economist uses the 2009 estimate of 10% obtained from the American Community Survey? Answer: a= 0.1 E= 0.02 , Sample Proportion= 9 , Za/2 (Rounded to three decimal places)= Sample Size= 606 (b) the economist does not use any prior estimates? Answer: Sample Size= 1681