And to figure out the median, what we want to do is order these numbers from least to greatest.
If the data is not in order : 1, 6, 2, 42, 12, 15, 99 We need to first rearrange the numbers before attempting to determine the median.
This is a simpler example, but in more complex cases it could tell us that there's some factor worth studying that the mean or mode may not have told us.