In recent years the average speed along a dangerous stretch of Highway 26 has been reported to be 55.8 mph.You plan to take a sample of cars along that stretch of highway to determine if the average speed recently is different from the reported average.What hypotheses would be appropriate for a hypothesis test here? Use a "status quo" approach to choose your null hypothesis. A) H₀: µ = 55.8 mph H_a: µ ≠ 55.8 mph B) H₀: µ ≠ 55.8 mph H_a: µ = 55.8 mph C) H₀: µ 55.8 mph H_a: µ ≠ 55.8 mph D) H₀: µ 55.8 mph H_a: µ = 55.8 mph

Question

In recent years the average speed along a dangerous stretch of Highway 26 has been reported to be 55.8 mph.You plan to take a sample of cars along that stretch of highway to determine if the average speed recently is different from the reported average.What hypotheses would be appropriate for a hypothesis test here? Use a "status quo" approach to choose your null hypothesis. A) H₀: µ = 55.8 mph H_a: µ ≠ 55.8 mph B) H₀: µ ≠ 55.8 mph H_a: µ = 55.8 mph C) H₀: µ > 55.8 mph H_a: µ ≠ 55.8 mph D) H₀: µ < 55.8 mph H_a: µ = 55.8 mph E) H₀: µ > 55.8 mph H_a: µ = 55.8 mph

Quizplus · Accepted Answer

The null hypothesis (H0) represents the status quo or a statement of no effect or no difference, which in this case is that the average speed is equal to 55.8 mph. The alternative hypothesis (Ha) is what you are testing for, which is any difference from the reported average, hence µ ≠ 55.8 mph.

In Recent Years the Average Speed Along a Dangerous Stretch