The Good stone Tire Company claims that the useful life of its tires is an average of

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The Good stone Tire Company claims that the useful life of its tires is an average of 68,000 km with a standard deviation of 10,000 km. Find the z scores corresponding to the following:
a. A tire that lasts 50,000 km
b. A tire that lasts 78,000 km
c. A tire that lasts 70,000 km
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Elementary Statistics

ISBN: 9780321225979

3rd Canadian Edition

Authors: Mario F. Triola

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