What percentage of the bearings will last for 38000000

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You have tested bearings for a particular machine. This resulted in a mean of 40,570,000 cycles with a standard deviation of 887,500 cycles (assume approximately normally distributed). (a.) What percentage of the bearings will last for 38,000,000 cycles? (b.) If the manufacturer is willing to accept a 5% failure rate, what warranty time should he put on the bearings?

Reference no: EM13626548

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