condition mean min max ZT0-3 103.754902 103.754902 103.754902 ZT4-7 134.2968765 134.2968765 134.2968765 ZT8-11 137.1961595 137.1961595 137.1961595 ZT12-15 142.88375050000002 142.88375050000002 142.88375050000002 ZT16-19 133.6630085 133.6630085 133.6630085 ZT20-23 140.3622745 140.3622745 140.3622745