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From "Sriram Natarajan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MATH-1185) Tail probability drops to zero beyond 10e-17 ?
Date Mon, 05 Jan 2015 03:44:34 GMT
Sriram Natarajan created MATH-1185:
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             Summary: Tail probability drops to zero beyond 10e-17 ?
                 Key: MATH-1185
                 URL: https://issues.apache.org/jira/browse/MATH-1185
             Project: Commons Math
          Issue Type: Wish
    Affects Versions: 3.3, 3.4
            Reporter: Sriram Natarajan
            Priority: Minor


This could be a  simple question, In which case I can expect a clarification. If this is the
wrong place to post such a question, let me know.

OS: Windows 8.1, Java 1.8.0_25

ChiSquaredDistribution chisq = new ChiSquaredDistribution(23)
1.0 - chisq.cumulativeProbability(130) is  1.1102230246251565E-16

1.0 - chisq.cumulativeProbability(131) is  0.0  

Am pretty sure it is not a formatting issue.  Is there a reason why the tail drops to zero
at this point?



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