Literaturnachweis - Detailanzeige
| Autor/inn/en | Sarkar, Jyotirmoy; Rashid, Mamunur |
|---|---|
| Titel | Visualizing the Sample Standard Deviation |
| Quelle | In: Educational Research Quarterly, 40 (2017) 4, S.45-61 (17 Seiten)Infoseite zur Zeitschrift
PDF als Volltext (1); PDF als Volltext kostenfreie Datei (2) |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0196-5042 |
| Schlagwörter | Sample Size; Sampling; Visualization; Geometric Concepts; Mathematical Formulas; Mathematical Models; Demonstrations (Educational); Research Methodology |
| Abstract | The standard deviation (SD) of a random sample is defined as the square-root of the sample variance, which is the "mean" squared deviation of the sample observations from the sample mean. Here, we interpret the sample SD as the square-root of twice the mean square of all pairwise half deviations between any two sample observations. This interpretation leads to a geometric visualization of the sample SD, and a more elementary explanation as to why the denominator in the sample variance is one less than the sample size. (As Provided). |
| Anmerkungen | Behavioral Research Press. Grambling State University, Math Department, P.O. Box 1191, Grambling, LA 71245. Tel: 318-274-2425; Web site: http://erquarterly.org/ |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2022/4/11 |
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