condition mean min max ZT0-3 0.8884855 0.8884855 0.8884855 ZT4-7 0.29185150000000004 0.29185150000000004 0.29185150000000004 ZT8-11 0.464191 0.464191 0.464191 ZT12-15 1.6526999999999998 1.6526999999999998 1.6526999999999998 ZT16-19 1.55501 1.55501 1.55501 ZT20-23 1.37823 1.37823 1.37823