Expectation and degrees of freedom for sample variance

Xiaofeng Steven Liu; Hyejo Hailey Shin

doi:10.1111/test.12221

Expectation and degrees of freedom for sample variance

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

Computer simulation can be used to demonstrate why the unbiased sample variance uses degrees of freedom (n−1). This is first demonstrated for sampling from a normal random variable, and in additional simulations for some selected non-normal random variables, namely, chi-square and binomial.

Original language	English
Pages (from-to)	54-57
Number of pages	4
Journal	Teaching Statistics
Volume	42
Issue number	2
DOIs	https://doi.org/10.1111/test.12221
Publication status	Published - 1 Jun 2020
Externally published	Yes

ASJC Scopus subject areas

Statistics and Probability
Education

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10.1111/test.12221

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Expectation and degrees of freedom for sample variance

Abstract

ASJC Scopus subject areas

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