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Mathematics, 20.03.2020 02:46 twistedhyperboles
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. H_0: μ < 40,000 H_a: μ >= 40,000
b. H_0: μ <= 40,000 H_a: μ > 40,000
c. H_0: μ > 40,000 H_a: μ <= 40,000
d. H_0: μ >= 40,000 H_a: μ < 40,000
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