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ID Category Severity Reproducibility Date Submitted Last Update
0000504 [ALGLIB] Statistics major have not tried 2013-02-16 11:00 2013-05-13 14:47
Reporter SergeyB View Status public  
Assigned To SergeyB
Priority normal Resolution fixed Platform
Status resolved   OS
Projection none   OS Version
ETA none Fixed in Version 3.8.0 Product Version
  Target Version 3.8.0 Product Build
Summary 0000504: FIXED: minor bug in the sign test (two sided alternative)
Description Sign test returns incorrect value for BothTails (slightly larger than 1.0) when sample has same number of values at both sides of supposed median value.

This bug was reported by Julin Urbano:
> double[] data = new double[] { 1, 2, 3, -4, -5, -6 };
> alglib.onesamplesigntest(data, data.Length, 0, out both, out left, out right);
> and you'll see that the 2-tailed p-value (variable both) is 1.3125,
> which can't happen :-)
Steps To Reproduce
Additional Information
Programming language Unspecified
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- Issue History
Date Modified Username Field Change
2013-02-16 11:00 SergeyB New Issue
2013-02-16 11:00 SergeyB Status new => assigned
2013-02-16 11:00 SergeyB Assigned To => SergeyB
2013-02-16 11:00 SergeyB Programming language => Unspecified
2013-05-13 14:47 SergeyB Summary Bug in the sign test (two sided alternative) => FIXED: minor bug in the sign test (two sided alternative)
2013-05-13 14:47 SergeyB Description Updated
2013-05-13 14:47 SergeyB Status assigned => resolved
2013-05-13 14:47 SergeyB Fixed in Version => 3.8.0
2013-05-13 14:47 SergeyB Resolution open => fixed


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