condition mean min max ZT0-3 668.6 668.6 668.6 ZT4-7 709.3 709.3 709.3 ZT8-11 569.0 569.0 569.0 ZT12-15 544.15 544.15 544.15 ZT16-19 709.5999999999999 709.5999999999999 709.5999999999999 ZT20-23 857.65 857.65 857.65