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There are two 8-year olds, two 10-year olds, and four 11-year olds. (They are all a year older.)
Last year the distribution looked like this.
7 7 9 9 10 10 10 10
Ten was the mode (the age that occurred most often). There were two 7-year-olds and two 9-year-olds. The mean age was 9 (72 divided by 8).
This year the distribution looks like this.
8 8 10 10 11 11 11 11
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