condition mean min max ZT0-3 25.01655 23.40025 26.180300000000003 ZT4-7 19.29135 19.29135 19.29135 ZT8-11 20.0919 20.0919 20.0919 ZT12-15 22.08315 22.01175 22.15455 ZT16-19 24.1679 24.1679 24.1679 ZT20-23 27.81935 27.81935 27.81935