condition mean min max ZT0-3 55.35353333333333 35.7538 73.85475 ZT4-7 40.7468 40.7468 40.7468 ZT8-11 67.55355 67.55355 67.55355 ZT12-15 124.5065 108.9425 140.0705 ZT16-19 120.539 120.539 120.539 ZT20-23 117.27250000000001 117.27250000000001 117.27250000000001