condition mean min max ZT0-3 37.25 37.25 37.25 ZT4-7 11.3 11.3 11.3 ZT8-11 46.25 46.25 46.25 ZT12-15 8.45 8.45 8.45 ZT16-19 38.7 38.7 38.7 ZT20-23 30.0 30.0 30.0