condition mean min max ZT0-3 1164.65 1164.65 1164.65 ZT4-7 520.3 520.3 520.3 ZT8-11 750.65 750.65 750.65 ZT12-15 716.6 716.6 716.6 ZT16-19 871.6 871.6 871.6 ZT20-23 1296.0 1296.0 1296.0