Arithmetic mean

Comparison of mean, median and mode of two log-normal distributions with different skewness.

In mathematics and statistics, the arithmetic mean (/ˌærɪθˈmɛtɪk ˈmiːn/), or simply the mean or average when the context is clear, is the sum of a collection of numbers divided by the number of numbers in the collection. The collection is often a set of results of an experiment, or a set of results from a survey. The term "arithmetic mean" is preferred in some contexts in mathematics and statistics because it helps distinguish it from other means, such as the geometric mean and the harmonic mean.

单词	Statistical mean
释义	Statistical mean 原声例句化学 Crash Course That's the statistical mean of the speeds of all the individual atoms or molecules in the system. 这是系统中所有单个原子或分子速度的统计平均值。英语百科 Arithmetic mean In mathematics and statistics, the arithmetic mean (/ˌærɪθˈmɛtɪk ˈmiːn/), or simply the mean or average when the context is clear, is the sum of a collection of numbers divided by the number of numbers in the collection. The collection is often a set of results of an experiment, or a set of results from a survey. The term "arithmetic mean" is preferred in some contexts in mathematics and statistics because it helps distinguish it from other means, such as the geometric mean and the harmonic mean.
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Statistical mean

Arithmetic mean