What is the standard error of x

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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 μ = 21.50 mpg and a standard deviation of σ = 2.75 mpg.

(a) What is the standard error of X

X¯ , the mean from a random sample of 9 fill-ups by one driver? (Round your answer to 4 decimal places.)

Reference no: EM132461639

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