condition mean min max ZT0-3 16.150000000000002 16.150000000000002 16.150000000000002 ZT4-7 43.8 43.8 43.8 ZT8-11 3.6999999999999997 3.6999999999999997 3.6999999999999997 ZT12-15 3.95 3.95 3.95 ZT16-19 29.0 29.0 29.0 ZT20-23 31.200000000000003 31.200000000000003 31.200000000000003