A statistic is a characteristic or measure obtained by ...

Here are examples that show how the rules for the quartiles work for both odd and even numbers of observations. Example . Finding the quartiles: odd number of observations. Here are the travel times in minutes for 15 workers in North Carolina, chosen at random by the Census Bureau: 30 20 10 40 25 20 10 60. 15 40 5 30 12 10 10 ................
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