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5. (15 points) In March 2014, Barack Obama's approval rating stood at 45% in Gallup's daily tracking poll of 300 randomly surveyed U.S. adults.

5. (15 points) In March 2014, Barack Obama's approval rating stood at 45% in Gallup's daily tracking poll of 300 randomly surveyed U.S. adults. Make a 95% confidence interval for his approval rating by all U.S. adults. Based on the 95% confidence interval, is Obama's approval rating different from his November 2011 approval rating of 42%.

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