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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 O 2 3 4

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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 O 2 3 4 5 Probability 0.264 0.289 0.249 0.143 0.045 0.010 . . . (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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