condition mean min max ZT0-3 52.269193 52.269193 52.269193 ZT4-7 51.1168545 51.1168545 51.1168545 ZT8-11 72.3826895 72.3826895 72.3826895 ZT12-15 77.270948 77.270948 77.270948 ZT16-19 78.2876375 78.2876375 78.2876375 ZT20-23 82.25244900000001 82.25244900000001 82.25244900000001