condition mean min max ZT0-3 60.86323333333334 48.92915 75.66435000000001 ZT4-7 46.74225 46.74225 46.74225 ZT8-11 39.1766 39.1766 39.1766 ZT12-15 41.847775 40.68075 43.0148 ZT16-19 48.37875 48.37875 48.37875 ZT20-23 79.60470000000001 79.60470000000001 79.60470000000001