A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining an average gas mileage of at least 29 mpg. To see if the goal is being met, they check the gasoline usage for 100 company trips chosen at random, finding a mean of 27.577 mpg and a standard deviation of 6.379 mpg. Does the sample provide convincing evidence the mean gas mileage is less than the goal set? Use a significance level of 0.10 to test the appropriate claim.      HoHo:Select an answer p̂ μ p ȳ  ? ≠ > = <        HaHa: Select an answer ȳ μ p̂ p  ? > ≠ < =   αα =   Test Statistic: t =   (Note: round the t-score to two decimal places) probability = Select an answer 0.986 0.014 0.028    decision: Select an answer Fail to reject H₀ Reject H₀  At the 0.10 level, there Select an answer is is not  significant evidence to conclude the mean gas mileage for this fleet of cars is Select an answer greater than different than less than   mpg.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining an average gas mileage of at least 29 mpg. To see if the goal is being met, they check the gasoline usage for 100 company trips chosen at random, finding a mean of 27.577 mpg and a standard deviation of 6.379 mpg. Does the sample provide convincing evidence the mean gas mileage is less than the goal set? Use a significance level of 0.10 to test the appropriate claim.    

  •  HoHo:Select an answer p̂ μ p ȳ  ? ≠ > = <        HaHa: Select an answer ȳ μ p̂ p  ? > ≠ < =  
  • αα =  
  • Test Statistic: t =   (Note: round the t-score to two decimal places)
  • probability = Select an answer 0.986 0.014 0.028   
  • decision: Select an answer Fail to reject H₀ Reject H₀ 
  • At the 0.10 level, there Select an answer is is not  significant evidence to conclude the mean gas mileage for this fleet of cars is Select an answer greater than different than less than   mpg. 
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