condition mean min max ZT0-3 71.75 71.75 71.75 ZT4-7 42.8 42.8 42.8 ZT8-11 37.0 37.0 37.0 ZT12-15 75.4 75.4 75.4 ZT16-19 86.1 86.1 86.1 ZT20-23 93.95 93.95 93.95