he shoe sizes of a group of middle school girls are shown.


5.5 6 7 8.5 6.5
6.5 8 7.5 8 5

If a shoe size of 6 is added to the data, how does the IQR change?
The IQR becomes a 1.5.
The IQR remains a 2.
The IQR remains a 2.5.
The IQR becomes a 3.