condition mean min max ZT0-3 9.57026575475 3.320582838 15.8199486715 ZT4-7 23.438854929999998 19.952574155 26.925135705 ZT8-11 44.9488731275 32.68639068 57.211355575 ZT12-15 43.2959812625 39.554980369999996 47.036982155000004 ZT16-19 35.2701589475 35.267265075 35.273052820000004 ZT20-23 39.755026799999996 39.524142499999996 39.985911099999996