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A mean is a numeric quantity representing the "center" of a collection of numbers or the number that you can replace all the numbers in a data set by to still achieve the same total (the total is not necessarily the sum). There are several kinds of means (or "measures of central tendency") in mathematics, especially in statistics. … 展开
Pythagorean means
Arithmetic mean (AM)
The arithmetic mean (or simply mean or average) of a list of numbers, is the sum of all of the numbers divided by their count. Similarly, the mean of a … 展开CC-BY-SA 许可证中的维基百科文本 Geometric mean - Wikipedia
In mathematics, the geometric mean is a mean or average which indicates a central tendency of a finite collection of positive real numbers by using the product of their values (as opposed to the arithmetic mean which uses their sum). The geometric mean is defined as the nth root of the product of n numbers, i.e., for a collection of numbers a1, a2, ..., an, the geometric mean is defined as
Wikipedia · CC-BY-SA 许可下的文字Wikipedia - Wikipedia
Wikipedia [c] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.
Mean - Simple English Wikipedia, the free encyclopedia
Learn about the different kinds of mean in mathematics and statistics, such as arithmetic mean, geometric mean, and harmonic mean. Find out how to calculate and interpret the mean of a …
Mean Definition (Illustrated Mathematics Dictionary) - Math is Fun
Illustrated definition of Mean: The Arithmetic Mean is the average of the numbers: a calculated central value of a set of numbers. ...
Mean (Average) | Brilliant Math & Science Wiki
Learn how to calculate the mean, also called the average, of a group of values. Find examples, formulas, and definitions of different types of series and weighted averages.
平均数 - 维基百科，自由的百科全书
平均数（英語： Mean, Average ，或稱平均值）是统计中的一个重要概念。为集中趋势的最常用测度值，目的是确定一组数据的均衡点。
Wikipedia | Definition, Encyclopedia, History, & Facts
1 天前 · Wikipedia, free Internet-based encyclopedia, started in 2001, that operates under an open-source management style. It is overseen by the nonprofit Wikimedia Foundation. Wikipedia uses collaborative software known as a …
Mean | Definition, Formula, & Facts | Britannica
2024年9月9日 · Mean, in mathematics, a quantity that has a value intermediate between those of the extreme members of some set. Several kinds of means exist, and the method of …
平均數 - 維基百科，自由的百科全書 - zh.wikipedia.org
平均數（英語： Mean, Average ，或稱平均值）是統計中的一個重要概念。為集中趨勢的最常用測度值，目的是確定一組數據的均衡點。
