[ https://issues.apache.org/jira/browse/IMPALA-7426?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jim Apple resolved IMPALA-7426. ------------------------------- Resolution: Fixed Fix Version/s: Impala 3.1.0 https://github.com/apache/impala/commit/cb26d8d82880e934aae9ef211ca7752de510e84a > 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 > Fix For: Impala 3.1.0 > > > 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)