Saving gas Congress regulates corporate fuel economyand sets an annual gas mileage for cars. A companywith a large fleet of cars hopes to meet the 2011 goal of30.2 mpg or better for their fleet of cars. To see if thegoal is being met, they check the gasoline usage for50 company trips chosen at random, finding a mean of32.12 mpg and a standard deviation of 4.83 mpg. Is this strong evidence that they have attained their fuel econ-omy goal? a) Write appropriate hypotheses.b) Are the necessary assumptions to make inferencessatisfied?c) Describe the sampling distribution model of mean fueleconomy for samples like this.d) Find the P-value.e) Explain what the P-value means in this context.f) State an appropriate conclusion.

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