If ƛ is a positive integer, then a Poisson random variable with parameter ƛ can be thought of as a sum of ƛ independent Poisson random variables, each with parameter one. It is a consequence of the central limit theorem that for large values of ƛ such a random variable can be well approximated by a normal random variable with the same mean and varianceComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Matemática