condition mean min max ZT0-3 78.30000000000001 78.30000000000001 78.30000000000001 ZT4-7 23.2 23.2 23.2 ZT8-11 40.9 40.9 40.9 ZT12-15 84.4 84.4 84.4 ZT16-19 101.05 101.05 101.05 ZT20-23 86.65 86.65 86.65