condition mean min max ZT0-3 38.896375 37.57085 40.2219 ZT4-7 39.0025 39.0025 39.0025 ZT8-11 40.912800000000004 40.912800000000004 40.912800000000004 ZT12-15 47.0099375 44.205075 49.8148 ZT16-19 35.20956666666667 33.347833333333334 37.0713 ZT20-23 0 0 0