sample mean

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English[edit]

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Noun[edit]

sample mean ‎(plural sample means)

  1. (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}.

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