condition mean min max ZT0-3 10.32986 10.29224 10.387875000000001 ZT4-7 11.10875 11.10875 11.10875 ZT8-11 7.78186 7.78186 7.78186 ZT12-15 14.396875000000001 13.891100000000002 14.902650000000001 ZT16-19 10.7594 10.7594 10.7594 ZT20-23 13.352 13.352 13.352