A manufacturer claims that the mean driving cost per mile of its sedans is less than that
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A manufacturer claims that the mean driving cost per mile of its sedans is less than that of its leading competitor. You conduct a study using 30 randomly selected sedans from the manufacturer and 32 from the leading competitor. The results are shown at the left. At α = 0.05, can you support the manufacturer’s claim? Assume the population variances are equal.
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Related Book For 
Elementary Statistics Picturing The World
ISBN: 9781292260464
7th Global Edition
Authors: Betsy Farber, Ron Larson
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