condition mean min max ZT0-3 43.644 29.65145 52.16115 ZT4-7 14.09955 14.09955 14.09955 ZT8-11 16.2829 16.2829 16.2829 ZT12-15 50.6255 38.044700000000006 63.2063 ZT16-19 63.146950000000004 63.146950000000004 63.146950000000004 ZT20-23 68.61144999999999 68.61144999999999 68.61144999999999