The engineering department of a car manufacturer claims that the fuel consumption rate of a new model is equal to 35.2 mi/gal. The advertising department wants to test this claim so they get a sample of 40 such cars and this sample yields = 33.6 mi/gal and a standard deviation s=4.2 mi/gal. Test the claim of the engineering department using a 0.05 level of significance. a) State your null and alternative hypothesis b) Choose the appropriate test statistic c) Critical values and corresponding critical region d) Compute the test statistic e) Decision and conclusion

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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The engineering department of a car manufacturer claims that the fuel consumption rate of a new
model is equal to 35.2 mi/gal. The advertising department wants to test this claim so they get a sample
of 40 such cars and this sample yields i = 33.6 mi/gal and a standard deviation s=4.2 mi/gal. Test the
claim of the engineering department using a 0.05 level of significance.
a) State your null and alternative hypothesis
b) Choose the appropriate test statistic
c) Critical values and corresponding critical region
d) Compute the test statistiC
e) Decision and conclusion
Transcribed Image Text:The engineering department of a car manufacturer claims that the fuel consumption rate of a new model is equal to 35.2 mi/gal. The advertising department wants to test this claim so they get a sample of 40 such cars and this sample yields i = 33.6 mi/gal and a standard deviation s=4.2 mi/gal. Test the claim of the engineering department using a 0.05 level of significance. a) State your null and alternative hypothesis b) Choose the appropriate test statistic c) Critical values and corresponding critical region d) Compute the test statistiC e) Decision and conclusion
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