condition mean min max ZT0-3 88.05 88.05 88.05 ZT4-7 126.2 126.2 126.2 ZT8-11 155.55 155.55 155.55 ZT12-15 137.95 137.95 137.95 ZT16-19 117.85 117.85 117.85 ZT20-23 105.85 105.85 105.85