condition mean min max ZT0-3 96.11403333333332 49.9941 122.73949999999999 ZT4-7 65.493 65.493 65.493 ZT8-11 121.54400000000001 121.54400000000001 121.54400000000001 ZT12-15 120.78049999999999 112.0145 129.54649999999998 ZT16-19 158.34449999999998 158.34449999999998 158.34449999999998 ZT20-23 197.5775 197.5775 197.5775