condition mean min max ZT0-3 1643.4 1643.4 1643.4 ZT4-7 1578.4 1578.4 1578.4 ZT8-11 1432.6999999999998 1432.6999999999998 1432.6999999999998 ZT12-15 1372.65 1372.65 1372.65 ZT16-19 1420.4 1420.4 1420.4 ZT20-23 1516.05 1516.05 1516.05