[Solved] In a study of distances traveled by buses before the first major engine failure, a sampling of 100 buses resulted in a mean of 96700 miles and
Question: In a study of distances traveled by buses before the first major engine failure, a sampling of 100 buses resulted in a mean of 96700 miles and standard deviation of 37500 miles. At the 0.05 level of significance, test the manufacturer’s claim that mean distance traveled before a major engine failure is more than 90000 miles.
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