condition mean min max ZT0-3 726.55 726.55 726.55 ZT4-7 473.1 473.1 473.1 ZT8-11 571.0 571.0 571.0 ZT12-15 757.9 757.9 757.9 ZT16-19 779.0 779.0 779.0 ZT20-23 800.05 800.05 800.05