condition mean min max ZT0-3 1.9000000000000001 1.9000000000000001 1.9000000000000001 ZT4-7 10.7 10.7 10.7 ZT8-11 2.4000000000000004 2.4000000000000004 2.4000000000000004 ZT12-15 6.35 6.35 6.35 ZT16-19 3.45 3.45 3.45 ZT20-23 3.7 3.7 3.7