Mathematics, 27.03.2020 00:25 Hfruit
Presidential approval Many news organizations conduct polls asking adults in the United States if they approve of the job the president is doing. How did President Obama’s approval rating change from August 2009 to September 2010? According to a CNN poll of 1024 randomly selected U. S. adults on September 1-2, 2010, 50% approved of Obama’s job performance. A CNN poll of 1010 randomly selected U. S. adults on August 28-30, 2009 showed that 53% approved of Obama’s job performance. Use the results of these polls to construct and interpret a 90% confidence interval for the change in Obama’s approval rating among all US adults. Based on your interval, is there convincing evidence that Obama’s job approval rating has changed?
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