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. C) H₀: μ 40,000 H_a: μ 40,000. D) H₀: μ 40,000 H_a: μ

Question

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 H_a: μ 40,000. B) H₀: μ 40,000 H_a: μ > 40,000. C) H₀: μ > 40,000 H_a: μ 40,000. D) H₀: μ 40,000 H_a: μ < 40,000.

Quizplus · Accepted Answer

The null hypothesis (H0) is that the average life expectancy of the tires is still 40,000 miles or less. The alternative hypothesis (Ha) is that the average life expectancy has increased, indicating a one-tailed test. The correct set of hypotheses is H₀: μ 11eb12c9_c698_2c2e_b394_d942ae189153_TB6985_11 40,000 H_a: μ > 40,000.

The Average Life Expectancy of Tires Produced by the Whitney