A cumulative poisson distribution is used to calculate the probability of getting atleast n successes in a poisson experiment. Here, n is the poisson random variable which refers to the number of success.
Formula:
P(x < n) = P(x = 0) + P(x = 1) + ... + P(x = n)
where, P(x = 0) and P(x = 1) is calculated using poisson distribution formula.
Example:
Consider, in an office 2 customers arrived today. Calculate the possibility for atleast 3 customers to be arrived on tomorrow.
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