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4. A single observation of a random variable having an exponential distribution is used to test the null hypothesis that the mean of the distribution

4. A single observation of a random variable having an exponential distribution is used to test the null hypothesis that the mean of the distribution is (9 = 2 versus the alternative that 9 = 5. If the null hypothesis is accepted if and only if the observed value of the random variable is less than 3, nd the probabilities of type I and type II errors

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