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14 The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. Suppose you bought a set of four tires; what Is the likelihood the mean tire life of these four tires is more than 66,000 miles? Multiple Choice O 0.4987 O 0.0013 O 0.9987 O 0.9544