Gasoline consumption following a normal distribution

Reference no: EM13102885

The manufacture of a new compact car claims the miles per gallon (mpg) for the gasoline consumption follow a normal distribution with mean of 25.9 mpg and standard deviation of 9.5 mpg . if 36 such cars are tested , what is the probability the average mpg (x bar ) is

a) less than 23 mpg

b) between 23 and 28 mpg

Reference no: EM13102885

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