condition mean min max ZT0-3 190.539749 190.539749 190.539749 ZT4-7 914.60832 914.60832 914.60832 ZT8-11 1392.2742585 1392.2742585 1392.2742585 ZT12-15 634.6695995 634.6695995 634.6695995 ZT16-19 318.4910645 318.4910645 318.4910645 ZT20-23 383.990185 383.990185 383.990185