condition mean min max ZT0-3 2735.8 2735.8 2735.8 ZT4-7 3519.3 3519.3 3519.3 ZT8-11 3600.75 3600.75 3600.75 ZT12-15 3876.2 3876.2 3876.2 ZT16-19 3323.45 3323.45 3323.45 ZT20-23 2908.25 2908.25 2908.25