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Average, number that is typical of a group of numbers or quantities. The 3 kinds of averages—mean, median, and mode—have different statistical significance. The mean is derived by taking the sum of a group of quantities and dividing it by the number of quantities. The median divides a sampling in half; there are the same number of items above and below it. The mode is the most frequently occurring number in a group.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Augusta to Barlach, Ernst