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How do you find the mean of a group of numbers?

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The general formula for the arithmetic mean is:

\bar{x} = \frac{1}{n}\sum_{i=1}^n x_i = \frac{1}{n} (x_1+\cdots+x_n)

To compute for the arithmetic mean, sum up all the numbers in the sample and divide the sum by the number of items in the sample.

Includes CC-BY-SA content from Wikipedia's Arithmetic_mean article (authors)

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