Question: The time before a breakdown is normally distributed and has a mean of 4 weeks and a standard deviation of .7 weeks. The value of

The time before a breakdown is normally distributed and has a mean of 4 weeks and a standard deviation of .7 weeks. The value of z is -.84. What is the calculated preventive maintenance interval?

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The time before a breakdown is normally distributed and has a mean of 4 weeks and a standard deviation of 7 weeks. The value of z is -.84. What is thecalculated preventive maintenance interval?

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