# Question

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

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