condition mean min max ZT0-3 168.9 168.9 168.9 ZT4-7 192.7 192.7 192.7 ZT8-11 193.2 193.2 193.2 ZT12-15 238.0 238.0 238.0 ZT16-19 189.25 189.25 189.25 ZT20-23 154.15 154.15 154.15