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68. A orist makes deliveries between 1:00 pm and 5:00 pm daily. Assume delivery times follow the continuous uniform distribution. a. b. Calculate the mean

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68. A orist makes deliveries between 1:00 pm and 5:00 pm daily. Assume delivery times follow the continuous uniform distribution. a. b. Calculate the mean and the variance of this distribution. Determine the percentage of deliveries that are made after 4:00 pm. Determine the percentage of deliveries that are made prior to 2:30 pm

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