condition mean min max ZT0-3 1062.35 1062.35 1062.35 ZT4-7 758.2 758.2 758.2 ZT8-11 761.9000000000001 761.9000000000001 761.9000000000001 ZT12-15 625.3 625.3 625.3 ZT16-19 829.55 829.55 829.55 ZT20-23 1038.9499999999998 1038.9499999999998 1038.9499999999998