condition mean min max ZT0-3 2.65 2.65 2.65 ZT4-7 1.3 1.3 1.3 ZT8-11 23.150000000000002 23.150000000000002 23.150000000000002 ZT12-15 2.55 2.55 2.55 ZT16-19 5.7 5.7 5.7 ZT20-23 3.9000000000000004 3.9000000000000004 3.9000000000000004