condition mean min max ZT0-3 0.263807 0.168949 0.3529485 ZT4-7 0.245911 0.245911 0.245911 ZT8-11 0.264561 0.264561 0.264561 ZT12-15 1.0694795 1.0081025 1.1308565 ZT16-19 0.7804690000000001 0.7804690000000001 0.7804690000000001 ZT20-23 0.3349625 0.3349625 0.3349625