The number of meters a student swam this week are listed.

200, 450, 600, 650, 700, 800

What is the appropriate measure of variability for the data shown, and what is its value?

The range is the best measure of variability and equals 600.
The IQR is the best measure of variability and equals 250.
The mean is the best measure of variability and equals about 567.
The median is the best measure of variability and equals 625.