condition mean min max ZT0-3 0.8344992702499999 0.666322935 1.0026756055 ZT4-7 2.74841405675 1.5891010305 3.907727083 ZT8-11 6.3601989974999995 5.797048127 6.923349868 ZT12-15 4.920912336500001 4.4103827335000005 5.4314419395 ZT16-19 3.5578404027499997 3.1498665489999995 3.9658142565 ZT20-23 3.4997356679999996 3.1503046345 3.8491667014999997