condition mean min max ZT0-3 152.6 152.6 152.6 ZT4-7 176.2 176.2 176.2 ZT8-11 185.3 185.3 185.3 ZT12-15 225.6 225.6 225.6 ZT16-19 133.05 133.05 133.05 ZT20-23 111.6 111.6 111.6