Here are the ages of 50 pennies, calculated as AGE = CURRENT YEAR − YEAR ON PENNY. The data have been sorted from smallest to largest.
0 0 1 1 2 2 2 2 3 3
4 4 4 4 4 4 4 4 5 5
5 5 6 6 6 6 6 7 10 10
10 10 11 12 13 17 19 20 20 20
22 22 24 24 24 25 26 28 29 36
(a)
What is the average age (in yr) of the pennies? calculate the mean
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