Find probability that task will take eight minutes

Reference no: EM13150642

A quality engineer has collected data that reveals a machine takes an average of 10 minutes to complete a task with a standard deviation of 1.5 minutes. The engineer would like to know the probability that the task will take between 8 minutes & 11 minutes. Find this probability. The engineer would also like to know what the time is such that 40% of the task times are less than this value.

Reference no: EM13150642

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