[ROOT-10595] Bias obtained in TH1::KolmogorovTest when using option X - SFTJIRA

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Type: Bug
Status: Closed (View Workflow)
Priority: High
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 6.22/00, 6.21/01
Component/s: Math Libraries
Labels:
None
Environment:

All

Development:

MERGED

Description

The p value obtained when using TH1::KolmogorovTest with the option "X", are biased to lower values.

The reason is that when generating pseudo-experiments only one of the histogram is randomized.

This affects the p-values that are displayed in the TMVAGui

See https://root-forum.cern.ch/t/how-does-tmva-calculate-the-kolmogorov-probability/27787/15

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Assignee:: Lorenzo Moneta

Reporter:: Lorenzo Moneta

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Dates

Created:: 03/Mar/20 5:15 PM

Updated:: 04/Mar/20 11:29 AM

Resolved:: 04/Mar/20 11:29 AM