The data represents the miles per gallon (mpg) for vehicles manufactured by a company in the past five years. Find the inter-quartile range of the data. Data: 28.7, 25.5, 21.8, 21.6, 20.5, 16.7, 16.3, 15.4, 13.9.
6.4
7.8
5.5
10.1

Question

The data represents the miles per gallon (mpg) for vehicles manufactured by a company in the past five years. Find the inter-quartile range of the data. Data: 28.7, 25.5, 21.8, 21.6, 20.5, 16.7, 16.3, 15.4, 13.9.
    6.4 
   7.8 
   5.5 
   10.1

anonymous · Answer

I believe inter-quartile is the third quartile minus the first quartile.  (Q3-Q1). But i'm not sure anymore.

anonymous · Answer

that's what I thought but I couldn't find out the anwer

anonymous · Answer

Well, if that's the case the solution would be 5.5

anonymous · Answer

Q1= 16.3
Q3 = 21.8?

anonymous · Answer

I did think but I didn't get the same answer the first time but I just did it again and it turned out right thanks both of you