unequal variance
collocation in Englishmeaningsofunequalandvariance
These words are often used together. Click on the links below to explore the meanings. Or,see other collocations withvariance.
unequal
adjective
uk/ʌnˈiː.kwəl/us/ʌnˈiː.kwəl/
formal
different in size, level, ...
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variance
noun
uk/ˈveə.ri.əns/us/ˈver.i.əns/
formal
the fact that two or more things are different, or the amount or number by which they ...
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(Definition ofunequalandvariancefrom theCambridge English Dictionary© Cambridge University Press)
Examplesofunequal variance
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
The t-test assumes a normal distribution of data ofunequalvariance.
From theCambridge English Corpus
We test the models for heteroscedasticity, and find evidence of significantunequalvarianceacross individuals.
From theCambridge English Corpus
To determine if analyses between removal and exclosure control plots were 'real', retrospective power analyses were conducted using a two-sampleunequalvariancecalculation.
From theCambridge English Corpus
We again test for heteroscedasticity in the choice models, finding evidence of significantunequalvarianceacross individuals.
From theCambridge English Corpus
Analysis revealed unequal variances in the dependent measure of overall competence.
From theCambridge English Corpus
Some data had unequal variances, or were not normally distributed.
From theCambridge English Corpus
This was an especially important step because unequal variances could account for any discerned differential patterns of prediction.
From theCambridge English Corpus
Repeated-measures analysis of variance was not used, because data are not normally distributed and have unequal variances.
From theCambridge English Corpus
In individuals experiencing such value conflict, we should observe unequal variances across observations, which is know as the familiar problem of heteroscedasticity.
From theCambridge English Corpus
Linear regression was used, but some data sets retained unequal variances after log transformation, and were not regressed.
From theCambridge English Corpus
This assumption may not be realistic for growth data, where repeated measurements within subjects are often correlated, and the within-group errors have unequal variances.
From theCambridge English Corpus
We used the t test for equality of means with unequal variances when the variances of the means differed.
From theCambridge English Corpus
We tested for differences between families (within season) and between dry and wet seasons (within family) using t-tests for populations with unequal variances.
From theCambridge English Corpus
Seven-year-olds responded similarly to adults, t(89)=0.15, p=0.89, but four-year-olds did not, t(78)=4.08, p<0.01 (adjusted for unequal variances).
From theCambridge English Corpus
Since the degrees of freedom is different from what it is in the unequal variances test, the "p" -values will differ slightly from what was found above.
From
Wikipedia
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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