Hello!
I need calculate student distribution for example for 8 degree of freedom and confidence probability 0.95
According to the t-distribution table (http://en.wikipedia.org/wiki/Student%27s_t-distribution)
f(8, 0.95)=2.306
I try use alglib::studenttdistribution function. I and what I see:
Code:
#include "specialfunctions.h"
int main(array<System::String ^> ^args)
{
Console::WriteLine(L"Test");
Console::WriteLine(L"f(8, 0.05)="+alglib::studenttdistribution(8, 0.05));
Console::WriteLine(L"f(8, 0.95)="+alglib::studenttdistribution(8, 0.95));
Console::WriteLine(L"------");
Console::WriteLine(L"f~(8, 0.05)="+alglib::invstudenttdistribution(8, 0.05));
Console::WriteLine(L"f~(8, 0.95)="+alglib::invstudenttdistribution(8, 0.95));
return 0;
}
Result:
Test
f(8, 0.05)=0,519325892460749
f(8, 0.95)=0,815037419273614
------
f~(8, 0.05)=-1,8595480375309
f~(8, 0.95)=1,8595480375309
What I'm wrong?
Alexandr.
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