condition mean min max ZT0-3 427.9 427.9 427.9 ZT4-7 573.2 573.2 573.2 ZT8-11 428.5 428.5 428.5 ZT12-15 371.75 371.75 371.75 ZT16-19 422.45000000000005 422.45000000000005 422.45000000000005 ZT20-23 400.04999999999995 400.04999999999995 400.04999999999995