Question

At their inauguration, the ages of the first six presidents of the United States were 57, 61, 57, 57, 58, and 57.
a. Find the mean age at inauguration, rounding to the nearest tenth. The mean of the most recent six presidents (Carter to Obama) was 55.3. Did the first six presidents tend to be a bit older or a bit younger than the most recent six presidents were?
b. Find the standard deviation of the ages at inauguration, rounding to the nearest tenth. The standard deviation of the most recent six presidents was 9.3 years. Did the first six tend to have more or less variation than the most recent six presidents had?


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  • CreatedJuly 16, 2015
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