condition mean min max ZT0-3 2879.2 2879.2 2879.2 ZT4-7 1947.2 1947.2 1947.2 ZT8-11 1900.7 1900.7 1900.7 ZT12-15 1950.6 1950.6 1950.6 ZT16-19 2134.45 2134.45 2134.45 ZT20-23 2594.2 2594.2 2594.2