Question:Congress regulates corporate fuel economy and sets an annual
gas mileage for cars. A company with...
Question
Congress regulates corporate fuel economy and sets an annual
gas mileage for cars. A company with...
Congress regulates corporate fuel economy and sets an annual
gas mileage for cars. A company with a large fleet of cars hopes to
meet the 2011 goal of 30.2 mpg or better for their fleet of cars.
To see if the goal is being met, they check the gasoline usage for
50 company trips chosen at random from over 1000 trips, finding a
mean of 32.12 mpg and a standard deviation of 4.83 mpg. Is this
strong evidence that they have attained their fuel economy
goal?
a) Check the appropriate conditions to perform this test.
State each condition and state whether it has been satisfied or
not.
b) Regardless of your answers to part (a), test an appropriate
hypothesis and state your conclusion. Use a significance level of
0.05. (Use your calculator to conduct this test. Do not do the
calculations by hand.)