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The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the...

The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of

3.3 miles per gallon.​

(a) What proportion of hybrids gets over 61 miles per​ gallon?

(b) What proportion of hybrids gets 52 miles per gallon or​ less?

(c) What proportion of hybrids gets between 59 and 62 miles per​ gallon?

(d) What is the probability that a randomly selected hybrid gets less than 45 miles per​ gallon?

Math   Statistics-And-Probability   
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