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Article
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Biometrika
Article . 1962 . Peer-reviewed
Data sources: Crossref
Biometrika
Article . 1962 . Peer-reviewed
Data sources: Crossref
https://dx.doi.org/10.1093/bio...
Article
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Testing Equality of Means after a Preliminary test of Equality of Variances

Testing equality of means after a preliminary test of equality of variances
descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1962Publisher:JSTORJournal:Biometrika, volume 49, page 403 (issn: 0006-3444, Copyright policy )
Authors: Gurland, J.; McCullough, R. S.;

doi: 10.2307/2333975 , 10.1093/biomet/49.3-4.403

Testing Equality of Means after a Preliminary test of Equality of Variances

Abstract

Abstract : IN TESTING EQUALITY OF MEANS OF TWO Normal populations, Student's t-test is not generally applicable when the variances of the two populations may be unequal and their ratio unknown. A procedure is considered whereby a preliminary test is performed to ascertain whether or not the variances may be regarded as equal. On the basis of the outcome of this preliminary test, one proceeds to test for equality of means. Tables of size and power are included to indicate the behavior of the proposed tests. (Author)

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    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 20
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    		 Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    		 Average
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
20
Average
Top 10%
Average
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