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    Variance of Poisson random variable

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    The number of false alarms a building fire alarm system registers has a Poisson distribution with a mean of 6 false alarms per year. The variance of the number of false alarms is what?

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    Solution Preview

    For a Poisson distribution mean = Variance
    Thus Variance= Mean = 6

    Please see attached file.

    Poisson ...

    Solution Summary

    The solution gives calculation of variance of Poisson random variable. The number of false alarms variance is examined.