condition mean min max ZT0-3 83.8 83.8 83.8 ZT4-7 73.8 73.8 73.8 ZT8-11 51.25 51.25 51.25 ZT12-15 74.5 74.5 74.5 ZT16-19 107.2 107.2 107.2 ZT20-23 95.05 95.05 95.05