condition mean min max ZT0-3 87.4 87.4 87.4 ZT4-7 85.4 85.4 85.4 ZT8-11 70.55000000000001 70.55000000000001 70.55000000000001 ZT12-15 158.8 158.8 158.8 ZT16-19 89.5 89.5 89.5 ZT20-23 79.35 79.35 79.35