condition mean min max ZT0-3 57.877449999999996 57.877449999999996 57.877449999999996 ZT4-7 44.0396 44.0396 44.0396 ZT8-11 49.48665 49.48665 49.48665 ZT12-15 42.9227 42.9227 42.9227 ZT16-19 61.85505 61.85505 61.85505 ZT20-23 61.7109 61.7109 61.7109