condition mean min max ZT0-3 38.5551095375 34.984550255 42.12566882 ZT4-7 11.77048360875 11.545251131 11.9957160865 ZT8-11 15.551519775000001 10.736651125000002 20.366388425 ZT12-15 14.9035315325 13.92725771 15.879805355 ZT16-19 18.45955573 18.442195050000002 18.47691641 ZT20-23 20.34970801 19.503108500000003 21.196307519999998