When lamba = 5 and you want to know the P(x <= 8) why is P(x<=8) = F(8;5) but P(x=8) = F(8;5) - F(7;5) Im confused, i thought the P(x<=8) would equal the sum from 0 to 8 and P(x=8) would equal F(8;5)
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Originally Posted by statman101 When lamba = 5 Im confused, i thought the P(x<=8) would equal the sum from 0 to 8 and P(x=8) would equal F(8;5) Both statements are correct. P(x<=8) =P(x=0) + P(x=1) + P(x=2) + P(x=3) + P(x=4) + P(x=5) + P(x=6) + P(x=7) + P(x=8)
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