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Mathematics, 20.03.2020 02:55 guitarislife97p73kzu

Each of 15 refrigerators of a certain type has been returned to a distributor because of an audible, high-pitched, oscillating noise when the refrigerators are running. Suppose that 10 of these refrigerators have a defective compressor and the other 5 have less serious problems. If the refrigerators are examined in random order, let X be the number among the first 9 examined that have a defective compressor. Determine the probability that X exceeds its mean value by more than 1 standard deviation.

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Each of 15 refrigerators of a certain type has been returned to a distributor because of an audible,...
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