condition mean min max ZT0-3 786.6 786.6 786.6 ZT4-7 647.5 647.5 647.5 ZT8-11 642.4 642.4 642.4 ZT12-15 736.0999999999999 736.0999999999999 736.0999999999999 ZT16-19 834.95 834.95 834.95 ZT20-23 906.1500000000001 906.1500000000001 906.1500000000001