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https://issues.apache.org/jira/browse/IMPALA-7426?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-7426 started by Jim Apple.
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> T-test is an unreliable method for comparing non-normal distributions
> ---------------------------------------------------------------------
>
> Key: IMPALA-7426
> URL: https://issues.apache.org/jira/browse/IMPALA-7426
> Project: IMPALA
> Issue Type: Bug
> Components: Infrastructure
> Reporter: Jim Apple
> Assignee: Jim Apple
> Priority: Major
>
> https://en.wikipedia.org/wiki/Student%27s_t-test is for normally distributed
> variables, and many Impala benchmarks won't be formally distributed. In
> particular, none of them will have negative run times.
> We should consider https://en.wikipedia.org/wiki/Nonparametric_statistics
> like
> https://en.wikipedia.org/wiki/Mann%E2%80%93Whitney_U_test#Comparison_to_Student's_t-test
> in report_benchmark_results.py.
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