A Gallup poll asked a random sample of 1000 adults nation-widethe following question:: "Are you in favor of the death penalty fora person convicted of murder?" 71% of the people in the sampleanswered "Yes".
1. A 95% Confidence Interval for the percent of all adultsnation-wide in favor of the death penalty is (Hint: Fill in thefirst blank with the sample % and the second with the margin oferror.)
? ? % +/- ? ?%
A recent CBS New poll randomly sampled 1,142 adults nationwideasking them the following question:
"As you may know, the legal drinking age is 21. Would youapprove or disapprove of states lowering the drinking age to 18, ifthe states felt that would give the police more time to enforceother laws?" 24% answered that they approved.
1. What is the expected value for the percent of all US adultswho would say they approve of lowering the drinking age to 18, ifthe states felt that would give the police more time to enforceother laws? ? ?%
2. What is the SD of the sample? (Round to 3 decimalplaces.)
3. Calculate the SE of the percentage of people in the samplewho answered "Approve". (Round to 2 decimal places.)
