condition mean min max ZT0-3 6.43052560175 5.7290881885000005 7.131963015 ZT4-7 6.10771342625 5.648168105 6.5672587475 ZT8-11 7.4496838805 5.829944897000001 9.069422864 ZT12-15 5.843343851 4.5947509985 7.0919367035 ZT16-19 4.657163614 4.4852392385 4.8290879895 ZT20-23 5.128236672 4.519595291 5.736878053