CATEGORICAL VARIABLES & VARIANCE ANALYSIS
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Last updated 12:07 PM on 3/29/26
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5 Terms
1
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What does an ANOVA test for
it tests to see if means differ between groups
2
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what are the hypotheses for ANOVA
null → μ1 = μ2 = …μx
alternate → atleast 2 means differ
3
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what are the assumptions of ANOVA
normal distribution
population variance for each sample is about the same
groups and the observations in the groups are independent
4
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what is the Kruskal Wallis test
the non parametric version of ANOVA
uses medians instead of means
5
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what are the Kruskal Wallis assumptions
only assumption is that groups are independent and observations within groups are also independent
