condition mean min max ZT0-3 93.85 93.85 93.85 ZT4-7 95.9 95.9 95.9 ZT8-11 97.3 97.3 97.3 ZT12-15 107.05 107.05 107.05 ZT16-19 163.9 163.9 163.9 ZT20-23 253.95 253.95 253.95