Chapter Test
Chapter
Chapter 7
Section
Chapter Test
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Solutions 13 Videos

Legs for a wooden dining room table are produced by a computer numerically controlled (CNC) lathe. The cutting blade lasts a mean time of 550 h with a standard deviation of 20 h. To avoid cutting errors, the shop manager would like to keep the probability of a failure to less than 0.002. How many hours should the blade be used before replacement? Explain.

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