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A manufacturer of microwave ovens is trying to determine the length of warranty...
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A manufacturer of microwave ovens is trying to determine the length of warranty period it should attach to its magnetron tube, the most critical component in the oven. Preliminary testing has shown that the length of life (in years), X, of a magnetron tube has an exponential probability distribution with mean 6.25.
Suppose a warranty period of five years is attached to the magnetron tube. What fraction of tubes must the manufacturer plan to replace, assuming that the exponential model with mean = 6.25 is correct?100%
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