condition mean min max ZT0-3 93.05 93.05 93.05 ZT4-7 98.8 98.8 98.8 ZT8-11 71.1 71.1 71.1 ZT12-15 30.15 30.15 30.15 ZT16-19 27.15 27.15 27.15 ZT20-23 55.0 55.0 55.0