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

MATLAB: An Introduction with Applications
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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.)
 
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