Details
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Bug
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Status: Resolved
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Major
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Resolution: Unresolved
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None
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None
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None
Description
The one way anova test seems sensitive to the distribution of data in some circumstances (not completely clear which circumstances yet).
Example:
select madlib.one_way_anova(level, value) from anova_test;
one_way_anova
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(3.19605033565888,28.6618271033655,4,77,0.79901258391472,0.372231520822928,2.14654734813501,0.0830236307841792)
(1 row)
CREATE TABLE anova_test2 as SELECT * FROM anova_test distributed by (level);
select madlib.one_way_anova(level, value) from anova_test2;
one_way_anova
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(2.75936790108985,29.0985095379345,4,77,0.689841975272463,0.377902721271877,1.82544855181438,0.13247440016284)
(1 row)