condition mean min max ZT0-3 53.15 53.15 53.15 ZT4-7 15.4 15.4 15.4 ZT8-11 14.8 14.8 14.8 ZT12-15 48.4 48.4 48.4 ZT16-19 25.55 25.55 25.55 ZT20-23 66.1 66.1 66.1