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Arithmetic Mean
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| Arithmetic Mean Given n numbers in any order, the arithmetic mean is defined as the sum of these n numbers divided by n. If the n observations are x1, x2, ..., xn, their mean, which we denote by The arithmetic mean can also be written: When the term "mean" is used without the modifier "arithmetic," it is assumed to refer to the arithmetic mean. |
(and read X-bar), is therefore:
Examples
Suppose we have a list of the following numbers:
The arithmetic mean is the sum of these numbers, 100, divided by the total number of entries in the list, 7, equal to 14.285
