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The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using...

The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel is a normally distributed random variable with a mean of u=22.00 MPG and a standard deviation of a=1.25 MPG (a) What is the standard error of X, the mean from a random sample of 25 fill-ups by one driver? (b) Within what interval would you expect the sample mean to fall, with 98 percent probability? The interval is from ? to ?

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