POSSIBLE POINTS: 25 Answer all part and show all work. Round all answers to nearest whole number or nearest percent
The EPA fuel economy estimates for automobile models tested recently predicted a Normal model with a mean of 25 mpg and a standard deviation of
6 mpg
a) What is the cutoff mpg for the top 10% of all cars?
b) About what percent of autos should get 31 mpg?
c) What percent of cars should get between 31 and 37 mpg?
d) What percent of cars should get more than 20 mpg?
e) Describe the gas mileage of the worst 20% of all cars?
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74°F Alert A