Staundart deviation

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A plot of normal distribution (or bell-shaped curve) where each band has a width of 1 standard deviation – See also: 68–95–99.7 rule

In stateestics, the staundart deviation (SD, an aw representit bi the lawer case Greek letter sigma σ or the Latin letter s) is a meisur that is uised tae quantifee the amoont o variation or dispersion o a set o data vailyies.[1] A law staundart deviation indicates that the data pynts tend tae be close tae the mean (an aw cried the expectit vailyie) o the set, while a heich staundart deviation indicates that the data pynts are spreid oot ower a wider range o vailyies.

References[eedit | eedit soorce]

  1. Bland, J.M.; Altman, D.G. (1996). "Statistics notes: measurement error". BMJ. 312 (7047): 1654. doi:10.1136/bmj.312.7047.1654. PMC 2351401. PMID 8664723.