SOLUTION: Complaints about an Internet brokerage firm occur at a rate of 4 per day. The number of complaints appears to be Poisson distributed. The probability that the firm receives 6 or

Question 1159710: Complaints about an Internet brokerage firm occur at a rate of 4 per day.
The number of complaints appears to be Poisson distributed.
The probability that the firm receives 6 or more complaints in a day is (to four decimal places):
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
6 or more complaints a day with lambda=4
This is 0.2149
calculator 1-Poissoncdf(4,6)
The Poisson distribution is calculated from the left, so do 1- which will be the complement.'
Can check by using poissonpdf for (4,0) through (4,5) and subtract that from 1.

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