The police chief in a local city claims that the average speed for cars and trucks on a stretch of road near a school is at least 45 mph.If this claim is to be tested,the null and alternative hypotheses are:
H₀ : μ < 45 mph
H_a : μ ≥ 45 mph

Question

Quizplus · Accepted Answer

The null hypothesis (H₀) should represent the statement being tested, which in this case is that the average speed is at least 45 mph. Therefore, the null hypothesis should be μ ≥ 45 mph, and the alternative hypothesis (H_a) should be μ < 45 mph.

The Police Chief in a Local City Claims That the Average