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A Fleet of Rental Cars - All the Same Make μ\mu

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Question 16
Multiple Choice
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Multiple Choice

A fleet of rental cars - all the same make, model, and year - has a mean fuel efficiency of 27 miles per gallon (mpg). A random sample of 43 cars are selected and the air filter of each is replaced with a new one. Let μ\mu be the population mean fuel efficiency score that would occur if every car's air filter were replaced. The air filter change is deemed effective if μ>27 mpg. \mu > 27 \text { mpg. } A test is made of H0:μ=27 versus H1:μ>27H _ { 0 } : \mu = 27 \text { versus } H _ { 1 } : \mu > 27
Assume that the air filter changes are effective. Which type of error is impossible?


A) Type II
B) Type I

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