Two-way Fisher F-test for analysis of variance (Anova)

 The calculator gives the probability value of an F-test, given the F-value and                                 degrees of freedom of numerator (DF1) and denominator (DF2), as well as                                 the value of the F-test given the probability.                                                             Screenprint of the two-way Fisher F-test calculator:

F-test calculator
F-distribution calculator

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 More examples of F-test graphics

 MATHEMATICS   A numerical solution of Fisher's F- probability distribution is obtained when either DF1 or DF2 are even. (See reference below.) When both are even, use the smallest. When both are uneven (odd) an approximate solution is to be found.   DF1 is even           Pc = 1 - sn/2 [ 1 + n.t / 2 + n (n+2) t2 / 8 + n (n+2) (n+4) t3 / 48 + n (n+2 ) (n+4) (n+6) t4 / 384 . . . . . ]   where:   s = n / (m+n.z), t = 1-s, m = DF1, n = DF2, z = reference value for the variable y following the F-distribution       (like the F-test value itself),   Pc = cumulative probability that can also be represented by the probability P(y