condition mean min max ZT0-3 704.3 704.3 704.3 ZT4-7 743.0 743.0 743.0 ZT8-11 747.3499999999999 747.3499999999999 747.3499999999999 ZT12-15 1067.8000000000002 1067.8000000000002 1067.8000000000002 ZT16-19 1280.8000000000002 1280.8000000000002 1280.8000000000002 ZT20-23 1029.25 1029.25 1029.25