condition mean min max ZT0-3 58.1230265625 42.67937215 73.566680975 ZT4-7 115.8849618875 94.469334725 137.30058904999999 ZT8-11 155.0470957 151.79980745 158.29438395 ZT12-15 55.950043772499995 25.494245874999997 86.40584167 ZT16-19 29.047863810000003 27.554162015 30.541565605000002 ZT20-23 26.7192274925 26.384993065 27.05346192