condition mean min max ZT0-3 10.0891 10.0891 10.0891 ZT4-7 9.919605 9.919605 9.919605 ZT8-11 7.32522 7.32522 7.32522 ZT12-15 7.918505000000001 7.918505000000001 7.918505000000001 ZT16-19 12.022 12.022 12.022 ZT20-23 10.017485 10.017485 10.017485