condition mean min max ZT0-3 0.9512790692499999 0.18540742450000003 1.717150714 ZT4-7 0.20139513074999998 0.17117336 0.2316169015 ZT8-11 0.598595573 0.2776388735 0.9195522724999999 ZT12-15 1.0162497639999999 0.9599175710000001 1.072581957 ZT16-19 0.19894183549999997 0.064792158 0.33309151299999995 ZT20-23 0.052128775 0.0367895325 0.0674680175