condition mean min max ZT0-3 4.949999999999999 4.949999999999999 4.949999999999999 ZT4-7 0.7 0.7 0.7 ZT8-11 2.1 2.1 2.1 ZT12-15 1.2000000000000002 1.2000000000000002 1.2000000000000002 ZT16-19 1.35 1.35 1.35 ZT20-23 0.95 0.95 0.95