Question: Listen The average completion time for one piece is 4.8 minutes with a standard deviation of 0.6 minutes. If completion times follow a normal distribution,

Listen The average completion time for one piece is 4.8 minutes with a standard deviation of 0.6 minutes. If completion times follow a normal distribution, how many minutes should it take to complete a piece in order to be in the lower 15% of the completion times distribution? in the upper 25% of the completion times distribution? x

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