I am trying to create an algorithm that could calculate the p-value given the chi-square statistic and the degrees of freedom. Can anyone please point me in the right direction on how I could go about to evaluate the formula and what prerequisites I need to learn before I could do it.

Question

razdiralem · Accepted Answer

∫      e          −              t        2                    t                  d        2            −      1          d  t  =  −      2            d      2          Γ      (          d      2        ,          t      2        )        ∫            χ      2        ∞        e          −              t        2                    t                  d        2            −      1          d  t  =      2            d      2          Γ      (          d      2        ,                  χ        2            2        )        Q                  χ        2            ,      d        =            Γ              (                  d          2                ,                              χ            2                    2                )                    Γ              (                  d          2                )            where appear the complete and incomplete gamma functions.