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http://www.openoffice.org/issues/show_bug.cgi?id=96521
                 Issue #|96521
                 Summary|Inverse Student's T-distribution not implemented corre
                        |ctly
               Component|Spreadsheet
                 Version|OOo 2.4.1
                Platform|PC
                     URL|
              OS/Version|Linux
                  Status|UNCONFIRMED
       Status whiteboard|
                Keywords|
              Resolution|
              Issue type|DEFECT
                Priority|P3
            Subcomponent|code
             Assigned to|spreadsheet
             Reported by|marco_cor





------- Additional comments from [EMAIL PROTECTED] Mon Nov 24 11:21:03 +0000 
2008 -------
according to Wikipedia ( http://en.wikipedia.org/wiki/T-distribution ) and to
the GNU Scientific Library (
http://www.network-theory.co.uk/docs/gslref/Thetdistribution.html ), the inverse
value for a Student's T-distribution, given in Calc by the function TINV, should
return something around 1.6 for a percentage of 5% with 200 degrees of freedom.
But in Calc the value is a bit higher, it is around 1.9.
To reproduce the bug just type in a Calc cell:
=TINV(0.05;200)

the result should be 1.65 while it is 1.97

why don't you use the GSL for implementing it?

Thanks

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