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Distributed random variable with a mean

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Reference no: EM132367552

The estimated fuel economy for a 2014 Toytoa Highlander 6 cylinder using premium fuel is a normally distributed random variable with a mean of 25.50mpg and a standard deviation of 2.25 mpg

(1) What is the standard error of X, the mean from a random sample of 25 fill ups by one driver?

(2) Within what interval would you expect the sample mean to fall with a 98% probability?

Reference no: EM132367552

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