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Expectation and degrees of freedom for sample variance |
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| Authors: | Xiaofeng Steven Liu Hyejo Hailey Shin |
| Institution: | University of South Carolina, Columbia, South Carolina, USA |
| 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. |
| Keywords: | |