The mean of a random variable is the weighted average of the values that the random variable can take, where each value is weighted by its respective probability.
The term mean is a synonym of the terms expected value and expectation.
The lecture entitled Expected value provides more details about the concept of mean.
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Please cite as:
Taboga, Marco (2021). "Mean", Lectures on probability theory and mathematical statistics. Kindle Direct Publishing. Online appendix. https://www.statlect.com/glossary/mean.
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