Question

The shoe sizes of a group of middle school girls are shown

5.5, 6, 7, 8.5, 6.5, 6.5, 8, 5.

If a shoe size of 8 is added to the data, how does the IQR change.

A. The IQR becomes a 3.
B. The IQR remains a 2.5.
C. The IQR remains a 2.
D. The IQR becomes a 1.5.

WORTH 15 POINT

Answer 1

The IQR changes to 2.25
so the answer is C. The IQR remains 2.