2,8,7,9,1,9,15,15,15
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find the mean in a set of frequency distribution
Examples of descriptive statistics are mean, median, mode, and midrange.
Add the min and max numbers and divide that sum by two. Here is an example: The data is {1, 1, 3, 50,60} The midrange is 30.5 since that is is (1 + 60) / 2 = 30.5.