If arrivals occur according to the Poisson distribution every 20 minutes, then which is NOT true?
A) λ = 20 arrivals per hour
B) λ = 3 arrivals per hour
C) λ = 1/20 arrivals per minute
D) λ = 72 arrivals per day

Question

Quizplus · Accepted Answer

The rate λ for a Poisson distribution is the average number of arrivals per time unit. If arrivals occur every 20 minutes, then λ = 3 arrivals per hour (since 60/20 = 3), not 20 arrivals per hour.

If Arrivals Occur According to the Poisson Distribution Every 20