NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1250692
Record Type: Journal
Publication Date: 2020
Pages: 4
Abstractor: As Provided
ISSN: ISSN-0141-982X
Expectation and Degrees of Freedom for Sample Variance
Liu, Xiaofeng Steven; Shin, Hyejo Hailey
Teaching Statistics: An International Journal for Teachers, v42 n2 p54-57 Sum 2020
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.
Wiley-Blackwell. 350 Main Street, Malden, MA 02148. Tel: 800-835-6770; Tel: 781-388-8598; Fax: 781-388-8232; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A