In a meeting, Matt estimates the average miles per gallon (mpg) of the fleet cars is 19 mpg. With a certain level of confidence, he announces the actual mpg is in the 16 to 22 mpg range. What is the Margin of Error?
A) 6 mpg
B) 0.50 mpg
C) 19 mpg
D) 3 mpg

Question

Quizplus · Accepted Answer

The Margin of Error is calculated as the difference between the upper limit of the confidence interval and the estimated value, or equivalently, the difference between the estimated value and the lower limit. Here, 22 mpg (upper limit) - 19 mpg (estimate) = 3 mpg, or 19 mpg (estimate) - 16 mpg (lower limit) = 3 mpg.

In a Meeting, Matt Estimates the Average Miles Per Gallon