condition mean min max ZT0-3 81.22088333333333 15.128150000000002 120.08500000000001 ZT4-7 16.0127 16.0127 16.0127 ZT8-11 23.1195 23.1195 23.1195 ZT12-15 34.7403 24.69315 44.78745 ZT16-19 69.6593 69.6593 69.6593 ZT20-23 117.731 117.731 117.731