The box plots below show the average gas mileage, in miles per gallon, of the cars sold at a dealership in June and in
December
Gas Mileage of Cars Sold in June
+
20
22
24
26
28
30
32
34
Gas Mileage of Cars Sold in December
The manager used the table below to compare the measures of center and the measures of variability
Range
Sold in June
Sold in December
ITION
Interquartile Range
29-22-7
21-16-5
What error did the manager make in the