Softball League Wins

Question: At the end of the season, the number of wins in a softball league for each of the eight teams is:

{10, 9, 5, 4, 4, 3, 3, 2)

What is the standard deviation of wins?

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... 5, 4, 4, 3, 3, 2}

Mean of the number of wins for the eight teams is equal to their ...