Suppose that a Normal model describes fuel economy (miles per gallon) for automobiles and that a Saturn has a standardized score (z $( \mathrm { z } - \mathrm { score } ) \text { of } + 2.2$ This means that Saturns . . .
A) get 2.2 mpg more than the average car.
B) achieve fuel economy that is 2.2 standard deviations better than the average car.
C) get 2.2 times the gas mileage of the average car.
D) get 2.2 miles per gallon.
E) have a standard deviation of 2.2 mpg.

Question

Quizplus · Accepted Answer

A z-score of +2.2 indicates that the Saturn's fuel economy is 2.2 standard deviations above the average fuel economy.

Suppose That a Normal Model Describes Fuel Economy (Miles Per (z−score) of +2.2( \mathrm { z } - \mathrm { score } ) \text { of } + 2.2(z−score) of +2.2

Suppose That a Normal Model Describes Fuel Economy (Miles Per $( \mathrm { z } - \mathrm { score } ) \text { of } + 2.2$