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March 6, 2015

Homework Help: stats

Posted by GLEN on Wednesday, July 13, 2011 at 10:11am.

A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least 26 miles per gallon. To see if the goal is being met they check the gasoline usage for 50 company trips chosen at 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 there necessary assumptions to make inferences satisfied?

C.) Describe the sampling distribution models of mean fuel economy for samples like this.

D.) Find the P- Value

E.) Explain what the p-vale means in this context?

F.) State an appropriate conclusion.

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