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Sampling Distribution of mean and variance Q.) The life length (in hours) of a device is exponentially distributed with parameter = 1000. Six devices are

Sampling Distribution of mean and variance

Q.) The life length (in hours) of a device is exponentially distributed with parameter = 1000. Six devices are tested and their times to failure are recorded. a. What is the probability that no device fails before 800 hours have elapsed? b. What is the probability that no device lasts more than 3000 hours?

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