condition mean min max ZT0-3 665.75 665.75 665.75 ZT4-7 835.6 835.6 835.6 ZT8-11 747.55 747.55 747.55 ZT12-15 965.95 965.95 965.95 ZT16-19 791.7 791.7 791.7 ZT20-23 747.45 747.45 747.45