condition mean min max ZT0-3 0.8932207124999999 0.511640825 1.2748005999999998 ZT4-7 4.24139148025 3.0311642599999997 5.4516187005 ZT8-11 4.0050195872500005 3.5913897885 4.418649386 ZT12-15 3.21097072925 3.1575755450000003 3.2643659135 ZT16-19 3.95071414225 3.71761703 4.1838112545 ZT20-23 5.29699348525 5.213081871 5.3809050995