A statistics student used a device to record the number of steps she took each day for six days. Here are data she recorded.

Day : Steps
1 : 13.000
2 : 11.100
3 : 9.900
4 : 10.100
5 : 11.000
6 : 11.000

What is the value of the IQR? Interpret this value.

a. The IQR is 1,000 steps. The range of the middle half of this student's daily steps is 1,000 steps.
b. The IQR is 1,000 steps. The range of the lower half of this student's daily steps is 1,000 steps.
c. The IQR is 11,000 steps. The range of the lower half of this student's daily steps is 11,000 steps.
d. The IQR is 11,000 steps. The range of the middle half of this student's daily steps is 11,000 steps.