condition mean min max ZT0-3 9.45 9.45 9.45 ZT4-7 11.6 11.6 11.6 ZT8-11 14.2 14.2 14.2 ZT12-15 11.1 11.1 11.1 ZT16-19 37.8 37.8 37.8 ZT20-23 37.8 37.8 37.8