condition mean min max ZT0-3 1.3587919772500001 1.2974161135 1.420167841 ZT4-7 2.43050111375 1.9342329805 2.926769247 ZT8-11 11.55585372425 7.0344002085 16.07730724 ZT12-15 56.312120405 44.925846105 67.698394705 ZT16-19 44.099491995 43.435415115 44.763568875000004 ZT20-23 51.5498182475 50.221284455 52.878352039999996