condition mean min max ZT0-3 57.68856666666667 49.9901 62.290949999999995 ZT4-7 142.011 142.011 142.011 ZT8-11 105.46605 105.46605 105.46605 ZT12-15 125.753275 100.28805 151.2185 ZT16-19 104.92505 104.92505 104.92505 ZT20-23 77.59684999999999 77.59684999999999 77.59684999999999