A fleet of rental cars - all the same make, model, and year - has a mean fuel efficiency of 25.6 miles per gallon (mpg). A random sample of 54 cars are selected and the air filter of each is replaced with a new one. Let μ
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>25.6mpg
A test is made of H0:μ=25.6 versus H1:μ>25.6
Assume that the air filter changes are effective but the conclusion is reached that the chan might not be effective. Which type of error, of any, has occurred?