[R] Inverse Student t-value

Andre geomodelers at gmail.com
Tue Sep 30 19:31:05 CEST 2014

Dear Sir/Madam,

I am trying to use calculation for two-tailed inverse of the student`s
t-distribution function presented by Excel functions like
=TINV(probability, deg_freedom).

For instance: The Excel function =TINV(0.0000408831,1221) =  returns

Would you like to show me a manual calculation for this?

Appreciate your helps in advance.

Cheers!  Andre

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