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impala/tests/benchmark
Jim Apple cb26d8d828 IMPALA-7426: Use Mann-Whitney U to compare benchmarks
The Mann-Whitney test can be used to compare samples taken from
non-normal distributions, and so can more accurately reflect
performance changes than a T-test. This patch does not remove t-tests
from the benchmark reporting, it just supplements them by including
the Mann-Whitney test result as well.

Change-Id: I8d6631ebeba1422b832def5cd68537624f672fa0
Reviewed-on: http://gerrit.cloudera.org:8080/11194
Reviewed-by: Jim Apple <jbapple-impala@apache.org>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
2018-09-12 21:10:54 +00:00
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