what is means of maths
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There are several kinds of mean in mathematics, especially in statistics.
For a data set, the arithmetic mean, also known as arithmetic average, is a central value of a finite set of numbers: specifically, the sum of the values divided by the number of values. The arithmetic mean of a set of numbers x1, x2, ..., xn is typically denoted by {\displaystyle {\bar {x}}}{\bar {x}}[note 1]. If the data set were based on a series of observations obtained by sampling from a statistical population, the arithmetic mean is the sample mean (denoted {\displaystyle {\bar {x}}}{\bar {x}}) to distinguish it from the mean, or expected value, of the underlying distribution, the population mean (denoted {\displaystyle \mu }\mu or {\displaystyle \mu _{x}}\mu _{x}[note 2]).[1]
Outside probability and statistics, a wide range of other notions of mean are often used in geometry and mathematical analysis;