condition mean min max ZT0-3 74.85 74.85 74.85 ZT4-7 230.7 230.7 230.7 ZT8-11 238.45 238.45 238.45 ZT12-15 192.35 192.35 192.35 ZT16-19 68.9 68.9 68.9 ZT20-23 53.4 53.4 53.4