condition mean min max ZT0-3 50.25 50.25 50.25 ZT4-7 82.5 82.5 82.5 ZT8-11 68.1 68.1 68.1 ZT12-15 95.4 95.4 95.4 ZT16-19 115.1 115.1 115.1 ZT20-23 100.6 100.6 100.6