A study surveyed students from two different schools about the number of books they read last month. The table below shows the frequency distribution of the number of books read by the 7 students from School X and the 9 students from School Y.
| Number of Books | School X | School Y |
|---|---|---|
| 1 | 0 | 1 |
| 2 | 1 | 2 |
| 3 | 2 | 2 |
| 4 | 1 | 2 |
| 5 | 2 | 1 |
| 6 | 1 | 1 |
| Total | 7 | 9 |
By how much is the median number of books read for School Y greater than the median number for School X?
