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In June 2012, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing for the country. Out of 1004 respondents, 663 said it was a good thing.

a. What percentage of those taking the poll said immigration was a good thing?

b. Check the conditions to determine whether you can use the CLT to find a confidence interval.

c. Find a 95% confidence interval for the proportion who believe immigration is a good thing.

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