sample mean


sample mean
the arithmetic mean of the observed values of a random sample, conventionally denoted by a barred variable, e.g., X (read “X bar”).

Medical dictionary. 2011.

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  • sample mean — noun Given a random sample from an dimensional random variable , a mean defined as See Also: population mean …   Wiktionary

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  • mean — A statistical measurement of central tendency or average of a set of values, usually assumed to be the arithmetic m. unless otherwise specified. [M.E., mene fr. O.Fr., fr. L. medianus, in the middle] arithmetic m. the m. calculated by adding a… …   Medical dictionary

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  • Sample (statistics) — In statistics, a sample is a subset of a population. Typically, the population is very large, making a census or a complete enumeration of all the values in the population impractical or impossible. The sample represents a subset of manageable… …   Wikipedia