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- Pooled_variance abstract "In statistics, pooled variance is a method for estimating variance of several different populations when the mean of each population may be different, but one may assume that the variance of each population is the same. If the populations are indexed , then the pooled variance can be estimated by the weighted average of the sample variances where is the sample size of population . Use of weighting factors instead of comes from Bessel's correction. Under the assumption of equal population variances, the pooled sample variance provides a higher precision estimate of variance than the individual sample variances. This higher precision can lead to increased statistical power when used in statistical tests that compare the populations, such as the t-test.The square-root of a pooled variance estimator is known as a pooled standard deviation.".
- Pooled_variance wikiPageExternalLink P04758.html.
- Pooled_variance wikiPageExternalLink Stats%20PPT.pdf.
- Pooled_variance wikiPageExternalLink Pooled_Standard_Deviation-295.htm.
- Pooled_variance wikiPageID "10910481".
- Pooled_variance wikiPageRevisionID "606237150".
- Pooled_variance hasPhotoCollection Pooled_variance.
- Pooled_variance subject Category:Analysis_of_variance.
- Pooled_variance subject Category:Statistical_terminology.
- Pooled_variance comment "In statistics, pooled variance is a method for estimating variance of several different populations when the mean of each population may be different, but one may assume that the variance of each population is the same. If the populations are indexed , then the pooled variance can be estimated by the weighted average of the sample variances where is the sample size of population . Use of weighting factors instead of comes from Bessel's correction.".
- Pooled_variance label "Pooled variance".
- Pooled_variance sameAs m.02qts1b.
- Pooled_variance sameAs Q7228635.
- Pooled_variance sameAs Q7228635.
- Pooled_variance wasDerivedFrom Pooled_variance?oldid=606237150.
- Pooled_variance isPrimaryTopicOf Pooled_variance.