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Mathematics, 27.02.2021 23:40 adriandehoyos1p3hpwc

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 = 20.50 mpg and a standard deviation of σ = 1.25 mpg. What is the standard error of X, the mean from a random sample of 16 fill-ups by one driver?

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