Originally Posted by
blacksheep Hi,
I'm trying to work out P(Y≥0.9) for Y~Beta(4,1).
I did P(Y≥0.9) = 1- P(Y≤0.9)
= 1 - (5-1)!/(4-1)! * (0.9^3) * (1-0.9)^0
= 1 - 2.916 = -1.916
But this is obviously wrong! I can't see where i have gone wrong.
Thanks for any help.