condition mean min max ZT0-3 111.30898 111.30898 111.30898 ZT4-7 173.1208765 173.1208765 173.1208765 ZT8-11 197.49853 197.49853 197.49853 ZT12-15 141.3010235 141.3010235 141.3010235 ZT16-19 142.427186 142.427186 142.427186 ZT20-23 154.0817675 154.0817675 154.0817675