Question: A company with large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least 26 mpg. To see if the goal is being met, they check the gasoline usage for 50 company trips chosen @ random, finding a mean of 25.02 mpg and a standard deviation of 4.83 mpg. Is this strong evidence that they have failed to attain their fuel economy goal.

a. Write appropriate hypothesis.

b. Are the necessary assumptions to perform inference satisfied?

c. Test the hypothesis and find the P-value.

d. Explain what the P-value means in this context.

e. State the appropriate conclusion.