Difference between revisions of "Mean"
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* [[Harmonic mean]] | * [[Harmonic mean]] | ||
* [[Power mean]] | * [[Power mean]] | ||
| − | * [[Root mean square]] (a.k.a. the [[quadratic mean]] | + | * [[Root mean square]] (a.k.a. the [[quadratic mean]]) |
The arithmetic mean, geometric mean, harmonic mean, and root mean square are all special cases of the power mean. | The arithmetic mean, geometric mean, harmonic mean, and root mean square are all special cases of the power mean. | ||
Revision as of 12:37, 26 July 2006
The mean of a set of real numbers usually refers to the arithmetic mean of the set (also known as the average). However, there are numerous other kinds of various means used in mathematics and statistics.
Types of Means
- Arithmetic mean
- Geometric mean
- Harmonic mean
- Power mean
- Root mean square (a.k.a. the quadratic mean)
The arithmetic mean, geometric mean, harmonic mean, and root mean square are all special cases of the power mean.
Inequalities and Optimization
There are numerous inequalities that relate different types of means. The most common are part of the RMS-AM-GM-HM inequality chain. This inequality chain is a set of special cases of the Power mean inequality.
