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 3.2 miles per gallon.​ (a) What...




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
3.2

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
58

and
61

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

miles per​ gallon?




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​(a) The proportion of hybrids that gets over
61

miles per gallon is
nothing.


​(Round to four decimal places as​ needed.)

​(b) The proportion of hybrids that gets
52

miles per gallon or less is
nothing.


​(Round to four decimal places as​ needed.)

​(c) The proportion of hybrids that gets between
58

and
61

miles per gallon is
nothing.


​(Round to four decimal places as​ needed.)

​(d) The probability that a randomly selected hybrid gets less than
45

miles per gallon is
nothing.


​(Round to four decimal places as​ needed.)





Jun 07, 2022
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