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:
H_o : μ < 45 mph
H_a : μ ≥ 45 mph

Question

Quizplus · Accepted Answer

The null and alternative hypotheses should be switched. The null hypothesis should state that the average speed is at least 45 mph, so the correct null and alternative hypotheses are:
H0: μ ≥ 45 mph
Ha: μ < 45 mph

The Police Chief in a Local City Claims That the Average