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5. Congress regulates corporate fuel economy and sets an annual gas mileage for cars. A company...

5. Congress regulates corporate fuel economy and sets an annual gas mileage for cars. A company with a large fleet of cars hopes to meet the 2011 goal of 30.2mpg or better for their fleet of cars. To see if the goal is being met, they check the gasoline usage for 50 company trips chosen at random, finding a mean of 32.12mpg and a standard deviation of 4.83mpg. In this strong evidence that they have attained their fuel economy goal?

a) Write the appropriate hypotheses.

b) Find the P-value. (Hint: Use the excel function t.dist(.) )

c) Explain what the P-value means in this context.

Please show all work.

Typed work only, no handwriting.

Math   Statistics-And-Probability   
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