High-power experimental engines are being developed by the Stevens Motor Company for use in its new sports coupe. The the maximum horsepower for the engine to be 810 HP. Sixteen engines are randomly selected for horsepower testing. The maximum HP of 890 with a standard deviation of 85 HP. Use the confidence interval approach to determine whether the average maximum HP for the experimental engine is significantly different from the maximum horsepower calculated by th significance level of a = 0.01. Assume the population of the maximum horsepower of engines is normally distributed. Step 2 of 2: Draw a conclusion and interpret the decision. Answer Because the hypothesized value falls in the interval, we fail to reject the null hypothesis. There is not sufficient evidence at level that the average maximum HP is different from the maximum HP calculated by the engineers. Because the hypothesized value does not fall in the interval, we reject the null hypothesis. There is sufficient evidence at the that the average maximum HP is different from the maximum HP calculated by the engineers. Because the hypothesized value does not fall in the interval, we fail to reject the null hypothesis. There is not sufficient evide 0.01 significance level that the average maximum HP is different from the maximum HP calculated by the engineers. Because the hypothesized value falls in the interval, we reject the null hypothesis. There is sufficient evidence at the 0.01 sig average maximum HP is different from the maximum HP calculated by the engineers.