condition mean min max ZT0-3 0.1757620505 0.062915868 0.288608233 ZT4-7 0.6391401219999999 0.4718135615 0.8064666825 ZT8-11 0.9793070165 0.817368934 1.141245099 ZT12-15 0.69188037475 0.615462806 0.7682979434999999 ZT16-19 0.6894203635 0.4985478769999999 0.88029285 ZT20-23 1.0814865457499998 0.802023629 1.3609494624999998