SOLUTION: The mean age of the 43 presidents of the United States (as of 2011) on the day of inauguration is 54.6 years, with a standard deviation of 6.3 years. A researcher constructed a 95

Question 868537: The mean age of the 43 presidents of the United States (as of 2011) on the day of
inauguration is 54.6 years, with a standard deviation of 6.3 years. A researcher constructed a 95% confidence interval for the mean age of presidents on inauguration day. He wrote that he was 95% confident that the mean age of the president on inauguration day is between 52.7 and 56.5 years of age. Is there anything wrong with the researcher�s analysis? Explain.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi

ME = 1.96*6.3/sqrt(43) = 1.88

CI: 54.6-1.9 < u <  54.6 + 1.9

  CI is (52.7,  56.5)  

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