condition mean min max ZT0-3 461.70378904999995 461.59419119999995 461.81338689999995 ZT4-7 225.006130525 202.599376 247.41288505 ZT8-11 96.07489076 81.809944245 110.33983727500001 ZT12-15 35.398364615000006 22.30062135 48.496107880000004 ZT16-19 43.4488485825 32.98629151 53.911405654999996 ZT20-23 78.081196985 77.38039574000001 78.78199823