condition mean min max ZT0-3 679.8 679.8 679.8 ZT4-7 494.3 494.3 494.3 ZT8-11 738.9 738.9 738.9 ZT12-15 849.6500000000001 849.6500000000001 849.6500000000001 ZT16-19 794.5 794.5 794.5 ZT20-23 713.2 713.2 713.2