condition mean min max ZT0-3 4852.168674 4852.168674 4852.168674 ZT4-7 4818.0752155 4818.0752155 4818.0752155 ZT8-11 3246.0588390000003 3246.0588390000003 3246.0588390000003 ZT12-15 3035.3590815 3035.3590815 3035.3590815 ZT16-19 2396.2855545 2396.2855545 2396.2855545 ZT20-23 2684.328329 2684.328329 2684.328329