Equation au Fisher Law
Let X be the ratio of independent chi-squared random variables having k1 and k2 degrees of freedom. (k1 = numerator, k2 = denominator). Then X has density ... (this will take three lines to type out) dF(X) = [ Gamma((k1 + k2)/2) / (Gamma(k1/2) * Gamma(k2/2)) ] * (k1/k2)^(k1/2) * X^((k1/2) - 1) * (1 + X * (k1/k2))^-((k1 + k2)/2) * dX My source is: Samuel S. Wilks. Mathematical Statistics. Wiley, 1962. equation (7.8.9), p. 186. q.v. Probably Google would turn up the same result. HTH - tom blackwell - u michigan medical school - ann arbor -
On Wed, 9 Apr 2003, Poizot Emmanuel wrote:
Hello, I would like to know the equation of Fisher law. Does any body can identicate me where to find it ? Thanks -- Cordialy ---------------------------------------- Emmanuel POIZOT Cnam/Intechmer Digue de Collignon 50110 Tourlaville Tél : (33)(0)2 33 88 73 42 Fax : (33)(0)2 33 88 73 39 -----------------------------------------