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# Let X have a Poisson distribution with parameter . Show ISBN: 9780321629111 32

## Solution for problem 90E Chapter 3

Probability and Statistics for Engineers and the Scientists | 9th Edition

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Problem 90E

Let X have a Poisson distribution with parameter ?. Show that E( X ) = ? directly from the definition of expected value.[Hint: The first term in the sum equals 0, and then x can be canceled. Now factor out m and show that what is left sums to 1.]

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Lecture 6: Random Variables 8.1 Random Variables -­ Definition: A random variable assigns a number to each outcome of a random circumstance, or, equivalently, a random variable assigns a number to each unit in a population. -­ Two broad classes of random variables: discrete random variables and continuous random...

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##### ISBN: 9780321629111

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