Math Solutions

[Solved] The Environmental Protection Agency (EPA) fuel economy ratings say that the Toyota Prius hybrid car gets 48 miles per gallon (mpg) on the highway.

Question: The Environmental Protection Agency (EPA) fuel economy ratings say that the Toyota Prius hybrid car gets 48 miles per gallon (mpg) on the highway. Deborah wonders whether the long-term average highway mileage of her new Prius is less than 48 mpg. She keeps careful records of the s mileage for 3000 miles of highway driving. Her result is \(\bar{X}\) = 47.2 mpg.

  1. What would the null (Ho) and alternative hypotheses (Ha) be to test her question about her cars actual mileage?

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