Question

In: Statistics and Probability

answer all questions please!!! The mean gas mileage for a hybrid car is 56 miles per...

answer all questions please!!!

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

62

miles per gallon? (b) What proportion of hybrids gets

52

miles per gallon or less?

left parenthesis c right parenthesis What(c) What

proportion of hybrids gets between

58

and

62

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

62

miles per gallon is

nothing.

(Round to four decimal places as needed.)

Expert Solution

Answer a) The proportion of hybrids gets over 62 is 0.0304

Answer b) The proportion of hybrids gets 52 miles per gallon or less is 0.1056

Answer c) The proportion of hybrids gets between 58 and 62 miles per gallon is 0.2356

Answer d) The probability that a randomly selected hybrid gets less than 45 miles per gallon is 0.0003

orchestra answered 2 years ago

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