condition mean min max ZT0-3 42.61371666666667 39.0396 44.551500000000004 ZT4-7 43.370999999999995 43.370999999999995 43.370999999999995 ZT8-11 40.3494 40.3494 40.3494 ZT12-15 42.723625 42.57305 42.8742 ZT16-19 55.27605 55.27605 55.27605 ZT20-23 49.9951 49.9951 49.9951