condition mean min max ZT0-3 13.2 13.2 13.2 ZT4-7 16.0 16.0 16.0 ZT8-11 45.0 45.0 45.0 ZT12-15 11.25 11.25 11.25 ZT16-19 36.55 36.55 36.55 ZT20-23 62.8 62.8 62.8