[OASIS Issue Tracker] Created: (OFFICE-2298) TTEST

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

TTEST 
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                 Key: OFFICE-2298
                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-2298
             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
          Issue Type: Sub-task
          Components: OpenFormula
    Affects Versions: ODF 1.2
            Reporter: Robert Weir 


== 6.17.80 TTEST ==

A lot of problems :(
(1) All formulas miss the degrees of freedom. It is necessary for TDIST. 
In case unequal variance there must be defined, whether the degrees of 
freedom are made integer by FLOOR or whether they remain real.
(2) In case paired: sqrt {n-1} is wrong because it is already contained 
in s_{X_1 - X_2}.
(3) In case equal variance: definition of s² is missing.
(4) In case unequal variance: definition does not meet usual 
definitions. In fact it is the definition for the equal variance case, 
with pooled variance.
(5) As TDIST actually returns the values of the cumulative distribution 
function, the definite integral in the formulas has to be revised 
together with TDIST.


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