condition mean min max ZT0-3 10.235 10.235 10.235 ZT4-7 11.1609 11.1609 11.1609 ZT8-11 9.742515000000001 9.742515000000001 9.742515000000001 ZT12-15 8.183375 8.183375 8.183375 ZT16-19 10.200825 10.200825 10.200825 ZT20-23 9.15271 9.15271 9.15271