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 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 miles per gallon.
D)have a standard deviation of 2.2 mpg.
E)get 2.2 times the gas mileage of 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 other metrics mentioned.

Suppose That a Normal Model Describes Fuel Economy (Miles Per