| 词汇 | example_english_unequal-variance |
| 释义 | unequal variancecollocation in Englishmeanings of unequaland varianceThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with variance. unequal adjective uk /ʌnˈiː.kwəl/ us /ʌnˈiː.kwəl/ formal different in size, level, ... See more at unequal 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 ... See more at variance Examples of unequal varianceThese 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 of unequalvariance. We test the models for heteroscedasticity, and find evidence of significant unequalvariance across individuals. To determine if analyses between removal and exclosure control plots were 'real', retrospective power analyses were conducted using a two-sample unequalvariance calculation. We again test for heteroscedasticity in the choice models, finding evidence of significant unequalvariance across individuals. Analysis revealed unequal variances in the dependent measure of overall competence. Some data had unequal variances, or were not normally distributed. This was an especially important step because unequal variances could account for any discerned differential patterns of prediction. Repeated-measures analysis of variance was not used, because data are not normally distributed and have unequal variances. In individuals experiencing such value conflict, we should observe unequal variances across observations, which is know as the familiar problem of heteroscedasticity. Linear regression was used, but some data sets retained unequal variances after log transformation, and were not regressed. 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. We used the t test for equality of means with unequal variances when the variances of the means differed. We tested for differences between families (within season) and between dry and wet seasons (within family) using t-tests for populations with unequal variances. 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). 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 This example is from Wikipedia and may be reused under a CC BY-SA license. 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. Want to learn more? Go to the definition of unequal Go to the definition of variance See other collocations with variance |
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