condition mean min max ZT0-3 131.7 131.7 131.7 ZT4-7 118.8 118.8 118.8 ZT8-11 100.95 100.95 100.95 ZT12-15 86.65 86.65 86.65 ZT16-19 149.0 149.0 149.0 ZT20-23 266.0 266.0 266.0