Can you recognize a Poisson situation? The Poisson distribution has 4 main characteristics:

1. An event of interest occurs randomly over time or space.
2. The average arrive rate remains constant.
3. The arrivals are independent of each other.
4. The random variable (X) is the number of events within an observed time interval.

Why does the number of yawns per minute by students in a classroom not a Poisson event (i.e. what characteristic does it not meet?) Why might the number of calls received per minute at a fire station not be a Poisson event? Name two other events per unit of time that might violate the assumption of the Poisson model. Identify what assumption was violated. In your response to your classmates post, do you agree with the characteristic that was violated?