The data set below has an outlier.

2, 10, 10, 11, 11, 12, 12, 12, 13, 14, 14

which value is changed the most by removing the outlier?

a: the range
b: the median
c: the lower quartile
d: the interquartile range

2, 10, 10, 11, 11, 12, 12, 12, 13, 14, 14

range: 14 - 2 = 12
median: 12
lower quartile: 10 
interquarile range: 14 - 10 = 4

10, 10, 11, 11, 12, 12, 12, 13, 14, 14
range: 14 - 10 = 4
median: 12
lower quartile: 10.5
interquartile range: 14 - 10.5 = 3.5

2 is the outlier.

the value that change is most is A. THE RANGE. 
From 12, it became 4 when the outlier was removed from the data set.

It equals 1373.5 that’s the solution