Author Question: Suppose that a Normal model describes fuel economy (miles per gallon) for automobiles and that a ... (Read 182 times)

cartlidgeashley · **on:** Jul 25, 2018

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) achieve fuel economy that is 2.2 standard deviations better than the average car.
C) get 2.2 mpg more than the average car.
D) have a standard deviation of 2.2 mpg.
E) get 2.2 times the gas mileage of the average car.

Question 2

Suppose a Normal model describes the number of pages printer ink cartridges last. If we keep track of printed pages for the 47 printers at a company's office, which must be true?

I. The page counts for those ink cartridges will be normally distributed.II. The histogram for those page counts will be symmetric.III. 95 of those page counts will be within 2 standard deviations of the mean.
A) I, II, and III B) I only C) II only D) none E) II and III

zacnyjessica · **Reply #1 on:** Jul 25, 2018

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