condition mean min max ZT0-3 187.1 187.1 187.1 ZT4-7 230.8 230.8 230.8 ZT8-11 129.3 129.3 129.3 ZT12-15 121.75 121.75 121.75 ZT16-19 194.35 194.35 194.35 ZT20-23 225.7 225.7 225.7