A quick question! The number of episodes per year of otitis media follows a Possion distribution with lambda = 1.6 episodes per year. Wouldn't the probability of getting 3 or more episodes of otitis media in the first 2 years of life be:> ppois(q=3, lambda=1.6*2, lower.tail = TRUE, log.p = FALSE)[1] 0.6025197 I am confused with the lambda and 3 or more.. thx much
33 died overa 10-year period from COPD, whereas only 24 such deaths could be expected based onstatewide mortality rates. I came up with ppois(q = 33, lambda = 24, lower.tail = FALSE), but it seems it is ppois(q = 32, lambda = 24, lower.tail = FALSE). I am confused with the q value. Why is it 32 instead 33? thx much