Based on tests of the Chevrolet Cobalt, engineers have found that the miles per gallon in highway driving are normally

Question

Based on tests of the Chevrolet Cobalt, engineers have found that the miles per gallon in highway driving are normally distributed, with a mean of 32 mpg and a standard deviation of 3.5 mpg. Include a sketch for each part.
a. What is the probability that a randomly selected Cobalt gets more than 34 mpg?
b. Ten Cobalts are randomly selected. What is the probability that the mean is more than 34 mpg?

Kunduz · Accepted Answer

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