condition mean min max ZT0-3 0.449853331 0.39752255100000006 0.502184111 ZT4-7 0.02542487825 0.0 0.0508497565 ZT8-11 9.629940549750001 2.0276092245 17.232271875000002 ZT12-15 25.1199624625 23.328393135 26.91153179 ZT16-19 9.22217697425 6.1457330975 12.298620851 ZT20-23 1.37418998125 0.7310922705 2.017287692