condition mean min max ZT0-3 71.1 71.1 71.1 ZT4-7 71.4 71.4 71.4 ZT8-11 28.6 28.6 28.6 ZT12-15 50.1 50.1 50.1 ZT16-19 52.7 52.7 52.7 ZT20-23 61.05 61.05 61.05