Question

A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining an average gas mileage of at least 29 mpg. To see if the goal is being met, they check the gasoline usage for 54 company trips chosen at random, finding a mean of 26.766 mpg and a standard deviation of 8.087 mpg. Does the sample provide convincing evidence the mean gas mileage is less than the goal set? Use a significance level of 0.05 to test the appropriate claim. H o : H a : α = Test Statistic: t = (Note: round the t-score to two decimal places) probability = decision: At the 0.05 level, there significant evidence to conclude the mean gas mileage for this fleet of cars is mpg.

Answer 1