In a Study of Distances Traveled by Buses Before the First

question 56

Multiple Choice

In a study of distances traveled by buses before the first major engine failure, a sample of 191 buses results in a mean of 96,700 km. The population standard deviation is known to be 37,500 km.
-The null and alternative hypotheses to test the claim that the mean distance traveled before a major engine failure is more than 90,000 km is _____.

• A)H_O: μ = 90,000 vs.H_A: μ ≠ 90,000
• B)H_O: μ ≥ 90,000 vs.H_A: μ < 90,000
• C)H_O: μ ≥ 96,700 vs.H_A: μ < 96,700
• D)H_O: μ ≠ 90,000 vs.H_A: μ = 90,000
• E)H_O: μ ≤ 90,000 vs.H_A: μ > 90,000

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