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1. The owner of a ?eet of taxi cabs wants to determine if there is a difference in the lifetime of two different brands of car batteries used in the ?eet of cabs. State the appropriate null and alternative hypotheses.

2. The safety coordinator of a manufacturing facility wishes to demonstrate that the mean time (in days) between safety incidents has deteriorated from the traditional 30 days. What are the appropriate null and alternative hypotheses?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91710247

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