condition mean min max ZT0-3 1910.614612 1910.614612 1910.614612 ZT4-7 2126.310556 2126.310556 2126.310556 ZT8-11 2201.3671974999997 2201.3671974999997 2201.3671974999997 ZT12-15 2516.888288 2516.888288 2516.888288 ZT16-19 2074.314845 2074.314845 2074.314845 ZT20-23 1841.2932945 1841.2932945 1841.2932945