Concept explainers
Suppose that a random variable
Example 1
A Poisson Distribution
The annual number of deaths in a certain town due to a particular disease has a Poisson distribution with parameter
Solution
The first few probabilities are (to four decimal places)
Notice how each probability
In general,
To sum the probabilities for all n, use the exact values, not the decimal approximations:
The series inside the parentheses is the power series for
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CALCULUS+ITS APPLICATIONS
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