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en.wikipedia.org/wiki/Average

In colloquial language, an average is a middle or typical number of a list of numbers. Different concepts of average are used in different contexts. Often " average" refers to the arithmetic mean, the sum of the numbers divided by how many numbers are being averaged; in mathematics ...

en.wikipedia.org/wiki/Arithmetic_mean

In mathematics and statistics, the arithmetic mean or simply the mean or average when the context is clear, is the sum of a collection of numbers divided by the ...

www.mathsisfun.com/mean.html

The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum ...

www.purplemath.com/modules/meanmode.htm

Find the mean, median, mode, and range for the following list of values: 13, 18, 13, 14, 13, 16, 14, 21, ... You should not assume that your mean will be one of your original numbers. The median is the middle .... get. Go. Basic Math. Basic Math.

www.khanacademy.org/math/probability/data-distributions-a1/summarizing-center-distributions/v/mean-median-and-mode

Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us!

www.wyzant.com/resources/lessons/math/elementary_math/mean_median_and_mode

Finding the mean, also known as averaging numbers, is a very useful thing to know ... Amy's math grades are: 99, 89, 94, 85, 79, 83, 95, 93, 100, 94, 80, 100.

www.ducksters.com/kidsmath/mean_median_mode_range.php

Mean - When people say "average" they usually are talking about the mean. You can figure out the mean by adding up all the numbers in the data and then ...

www.virtualnerd.com/middle-math/probability-statistics/mean-median-mode-range/mean-data-set

mathforum.org/library/drmath/view/58326.html

Consider the set of numbers 80, 90, 90, 100, 85, 90. They could be math grades, for example. The MEAN is the arithmetic average, the average ...