U.S. presidents. Heres a histogram of 20 randomly selected U.S. presidents ages at the time of their
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U.S. presidents. Here’s a histogram of 20 randomly selected U.S. presidents’ ages at the time of their inauguration, showing the average age to be 56.95 years with a standard deviation of 6.6052 years (https://www
.thoughtco.com/oldest-presidents-in-u-s-history-1779976).
a) Find a 95% confidence interval for the mean age of the U.S. presidents.
b) Is the data fulfilling the assumptions and conditions for inference? Discuss.
c) The data are the mean age of the U.S. presidents. Is that another concern in interpreting the interval?
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Anurag Agrawal
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Related Book For 
Business Statistics
ISBN: 9781292269313
4th Global Edition
Authors: Norean Sharpe, Richard De Veaux, Paul Velleman
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