condition mean min max ZT0-3 108.81552679333333 92.49609228666667 125.13496130000001 ZT4-7 72.86318095166666 64.13135314333334 81.59500876 ZT8-11 56.278385220000004 55.60428159 56.95248885 ZT12-15 50.913148480000004 46.45265096666667 55.373645993333334 ZT16-19 75.34415394999999 72.25385061666667 78.43445728333333 ZT20-23 93.09167708 89.84280966 96.3405445