condition mean min max ZT0-3 84.6 84.6 84.6 ZT4-7 79.4 79.4 79.4 ZT8-11 96.05 96.05 96.05 ZT12-15 102.95 102.95 102.95 ZT16-19 175.25 175.25 175.25 ZT20-23 100.15 100.15 100.15