Definition
Suppose we have sample space . Then the arithmetic mean is defined via the equation
- .
If the list is a statistical population, then the mean of that population is called a population mean. If the list is a statistical sample, we call the resulting statistic a sample mean.
The arithmetic mean of a variable is often denoted by a bar, for example (read "x bar") would be the mean of some sample space .
Read more about this topic: Arithmetic Mean
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—Ralph Waldo Emerson (1803–1882)
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