condition mean min max ZT0-3 216.7 216.7 216.7 ZT4-7 24.0 24.0 24.0 ZT8-11 94.35 94.35 94.35 ZT12-15 80.10000000000001 80.10000000000001 80.10000000000001 ZT16-19 91.15 91.15 91.15 ZT20-23 153.65 153.65 153.65