The number of cases of tetanus reported in the United States during a single month in 1989 has a Poisson distribution with parameter h = 4.5 [8].
a. Compute the probability that exactly one case of tetanus will be reported during a given month?
b. Compute the probability that at most two cases of tetanus will be reported?
c. Compute the probability that four or more cases will be reported?
d. Determine the mean number of cases of tetanus reported in a one-month period?
Find out the standard deviation?