condition mean min max ZT0-3 9.861907500000001 9.225715000000001 10.4981 ZT4-7 3.0452950000000003 3.0452950000000003 3.0452950000000003 ZT8-11 1.445955 1.445955 1.445955 ZT12-15 0 0 0 ZT16-19 5.228400000000001 5.228400000000001 5.228400000000001 ZT20-23 7.029915000000001 7.029915000000001 7.029915000000001