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A factory produces car tires. The number of miles each tire lasts before it completely wares out follows a normal distribution with mean y =

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A factory produces car tires. The number of miles each tire lasts before it completely wares out follows a normal distribution with mean y = 50,000 miles and standard deviation 0 = 8,000 miles. What is the Z-score for x = 48,000? 0 -0.5 -0.25 0 0 -1 O 1

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