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

Question

Quizplus · Accepted Answer

A z-score of +2.2 indicates that the Toyota Corolla's fuel economy is 2.2 standard deviations above the mean, not the actual miles per gallon or a multiple of the average.

Suppose That a Normal Model Describes Fuel Economy (Miles Per