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describe the probability using normal distribution.

Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean of 24.8 mpg as well as a standard deviation of 6.2mpg for highway driving. Presume that a normal model can be applied.

1) Draw the model for auto fuel economy. Clearly label it and showing what the 68-95-99.7 Rule predicts about miles per gallon.

2) In what interval would you expect the central 68% of autos to be found?

3) About what percent of autos should get more than 31 mpg?

4) About what percent of cars should get between 31 and 37 mpg?

5) Define the gas mileage of the worst 2.5% of all cars.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920175

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