A company with a large fleet of cars hopes to keep gasoline costs down and sets...
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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 24 miles per gallon. To see if the goal is being met, they check the gasoline usage for 60 company trips chosen at random, finding a mean of 22.24 mpg and a standard deviation of 4.98 mpg. Is this strong evidence they have failed to attain their fuel economy goal? Complete parts a through e below. a) Write appropriate hypotheses. Which hypotheses below will test if the company failed to attain their goal? O A. Ho: H= 24 Ha u#24 D. Ho: H= 24 о в. На: и#24 Ha u=24 OE H, u> 24 HA u= 24 OC. Ho: u= 24 Ha u> 24 OF Ho: μ< 24 HAu<24 Hau=24 b) Are the necessary assumptions to perform inference satisfied? O A. No, the 10% condition is not satisfied. O B. No, the nearly normal condition is not satisfied. C. Yes, all the necessary assumptions are satisfied or can be assumed to be satisfied. O D. No, the randomization condition is not satisfied. c) Find the P-value. The P-value is 0.497. (Round to three decimal places as needed.) 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 24 miles per gallon. To see if the goal is being met, they check the gasoline usage for 60 company trips chosen at random, finding a mean of 22.24 mpg and a standard deviation of 4.98 mpg. Is this strong evidence they have failed to attain their fuel economy goal? Complete parts a through e below. a) Write appropriate hypotheses. Which hypotheses below will test if the company failed to attain their goal? O A. Ho: H= 24 Ha u#24 D. Ho: H= 24 о в. На: и#24 Ha u=24 OE H, u> 24 HA u= 24 OC. Ho: u= 24 Ha u> 24 OF Ho: μ< 24 HAu<24 Hau=24 b) Are the necessary assumptions to perform inference satisfied? O A. No, the 10% condition is not satisfied. O B. No, the nearly normal condition is not satisfied. C. Yes, all the necessary assumptions are satisfied or can be assumed to be satisfied. O D. No, the randomization condition is not satisfied. c) Find the P-value. The P-value is 0.497. (Round to three decimal places as needed.)
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Related Book For
Business Statistics
ISBN: 978-0321925831
3rd edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
Posted Date:
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