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Use the probability distribution to complete parts (a) and (b) below. The number of defects per 1000 machine parts inspected Defects 0 2 3 h

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Use the probability distribution to complete parts (a) and (b) below. The number of defects per 1000 machine parts inspected Defects 0 2 3 h 4 5 Probability 0.267 0.288 0.235 ' 0.145 0.046 0.019 (a) Find the mean, variance, and standard deviation of the probability distribution. The mean is (Round to one decimal place as needed.)

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