The Average Life Expectancy of Tires Produced by the Whitney

The average life expectancy of tires produced by the Whitney Tire Company has been 40,000 miles. Management believes that due to a new production process, the life expectancy of their tires has increased. In order to test the validity of their belief, the correct set of hypotheses is

A) H0: μ < 40,000 Ha: μ ≥ 40,000
B) H0: μ ≤ 40,000 Ha: μ > 40,000
C) H0: μ > 40,000 Ha: μ ≤ 40,000
D) H0: μ ≥ 40,000 Ha: μ < 40,000

Correct Answer:

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