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Definition 2025

sample_mean

sample mean

English

Noun

sample mean ‎(plural sample means)

(statistics) Given a random sample $\textstyle \mathbf {x} _{1},\ldots ,\mathbf {x} _{N}$ from an $\textstyle n$ -dimensional random variable $\textstyle \mathbf {X}$ , a mean defined as
$\mathbf {\bar {x}} ={\frac {1}{N}}\sum _{k=1}^{N}\mathbf {x} _{k}.$

Related terms

population mean

Translations

mean

Czech: výběrový průměr m