condition mean min max ZT0-3 818.3 818.3 818.3 ZT4-7 671.2 671.2 671.2 ZT8-11 709.9000000000001 709.9000000000001 709.9000000000001 ZT12-15 698.0 698.0 698.0 ZT16-19 910.45 910.45 910.45 ZT20-23 905.85 905.85 905.85