In a meeting, Matt estimates the average miles per gallon (mpg) of the fleet cars is...
In a meeting, Matt estimates the average miles per gallon (mpg) of the fleet cars is 24 mpg. With a certain level of confidence, he announces the actual mpg is in the 21 to 27 mpg range. What is the Margin of Error?
A. 6 mpg
B. 24 mpg
C. 3 mpg
D. 0.50 mpg
Homework Answers
Solution :
=
(Lower confidence interval + Upper confidence interval ) / 2
Sample mean =
= (21+27) / 2=24
Margin of error = E = Upper confidence interval -
= 27-24=3
Margin of error = E=3mpg
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