I find strange results with this function :
qpoisson(5:5)=0.559507
where any Poisson table gives 0.6160
(excel function LOI.POISSON also gives 0.6160
other examples
qpoisson(10:10)=0.54207
instead of 0.5831
qpoisson(20:20)=0.5297
instead of 0.559
is it a bug ?
