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QUESTION
Jim, the client, believes that 99% of the time, his sales are never higher than 390 units and never lower than 210 units with an average of 300 units....
Jim, the client, believes that 99% of the time, his sales are never higher than 390 units and never lower than 210 units with an average of 300 units. What is the standard deviation for the probability distribution Jim describes?
