condition mean min max ZT0-3 445.1 445.1 445.1 ZT4-7 310.9 310.9 310.9 ZT8-11 373.20000000000005 373.20000000000005 373.20000000000005 ZT12-15 391.0 391.0 391.0 ZT16-19 576.95 576.95 576.95 ZT20-23 537.55 537.55 537.55