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4 cards from this section. Quick, good the night before a test.
What is the PMF of a Poisson distribution?
It involves the average rate of events (λ).
If λ = 3, what is the mean of the distribution?
Recall that mean and variance are equal in Poisson distribution.
What is the mean of a Poisson distribution?
It’s the same as the variance.
True or False: The Poisson distribution can be used to describe the number of emails received in an hour.
Consider real-life counting scenarios.
A store receives, on average, 20 customers per hour. Calculate the probability that exactly 15 customers arrive in the next hour.
Apply the PMF of the Poisson distribution!
In a research study, a reviewer finds an error in 1 out of every 30 submissions. If 300 submissions were reviewed, calculate the probability of finding 10 errors.
Use your established λ to find the probability!
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