condition mean min max ZT0-3 3.9000000000000004 3.9000000000000004 3.9000000000000004 ZT4-7 9.8 9.8 9.8 ZT8-11 36.4 36.4 36.4 ZT12-15 10.7 10.7 10.7 ZT16-19 2.45 2.45 2.45 ZT20-23 15.5 15.5 15.5