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

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 30.2 mpg 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 from over 1000 trips, finding a mean of 32.12 mpg and a standard deviation of 4.83 mpg. Is this strong evidence that they have attained their fuel economy goal?



a) Check the appropriate conditions to perform this test. State each condition and state whether it has been satisfied or not.
b) Regardless of your answers to part (a), test an appropriate hypothesis and state your conclusion. Use a significance level of 0.05. (Use your calculator to conduct this test. Do not do the calculations by hand.)
Math   Statistics-And-Probability   
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