condition mean min max ZT0-3 141.63066666666666 99.2165 173.1575 ZT4-7 73.9479 73.9479 73.9479 ZT8-11 112.3955 112.3955 112.3955 ZT12-15 120.443 119.7675 121.1185 ZT16-19 108.4165 108.4165 108.4165 ZT20-23 176.121 176.121 176.121