Question: a A poll of 2 277 likely voters was conducted on

(a) A poll of 2,277 likely voters was conducted on the president's performance. Approximately what margin of error would the approval rating estimate have?
(b) The poll showed that 44 percent approved the president's performance. Construct a 90 percent confidence interval for the true proportion.
(c) Would you say that the percentage of all voters who approve of the president's performance could be 50 percent?

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