condition mean min max ZT0-3 25.77094838875 11.3067407375 40.23515604 ZT4-7 9.726555704499999 9.013386323999999 10.439725085 ZT8-11 17.590977345000002 11.72763769 23.454317000000003 ZT12-15 17.484922017499997 16.53741285 18.432431185 ZT16-19 16.3972157575 15.927875575 16.866555939999998 ZT20-23 19.22679107 18.500925055000003 19.952657085