[R] Inverse Student t-value
geomodelers at gmail.com
Tue Sep 30 20:11:46 CEST 2014
No, that's correct. Actually, I have data set below;
degree of freedom= 1223-2= 1221
So, TINV(0.0000408831,1221) returns 4.0891672
Could you show me more detail a manual equation. I really appreciate it if
you may give more detail.
On Wed, Oct 1, 2014 at 1:01 AM, Duncan Murdoch <murdoch.duncan at gmail.com>
> On 30/09/2014 1:31 PM, Andre wrote:
>> 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.
> That number looks pretty far off the true value. Have you got a typo in
> your example?
> You can compute the answer to your question as abs(qt(0.0000408831/2,
> df=1221)), but you'll get 4.117.
> Duncan Murdoch
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