condition mean min max ZT0-3 41.824036 41.824036 41.824036 ZT4-7 44.912617499999996 44.912617499999996 44.912617499999996 ZT8-11 77.86153300000001 77.86153300000001 77.86153300000001 ZT12-15 54.0577395 54.0577395 54.0577395 ZT16-19 64.2071575 64.2071575 64.2071575 ZT20-23 75.260185 75.260185 75.260185