chickadee » statistics » poisson-probability

returns the probability of k events occurring when the average is mu.

> (do-ec (: i 0 20) 
         (format #t "P(X=~2d) = ~,4f~&" i (poisson-probability 10 i)))
P(X= 0) = 0.0000
P(X= 1) = 0.0005
P(X= 2) = 0.0023
P(X= 3) = 0.0076
P(X= 4) = 0.0189
P(X= 5) = 0.0378
P(X= 6) = 0.0631
P(X= 7) = 0.0901
P(X= 8) = 0.1126
P(X= 9) = 0.1251
P(X=10) = 0.1251
P(X=11) = 0.1137
P(X=12) = 0.0948
P(X=13) = 0.0729
P(X=14) = 0.0521
P(X=15) = 0.0347
P(X=16) = 0.0217
P(X=17) = 0.0128 
P(X=18) = 0.0071
P(X=19) = 0.0037