condition mean min max ZT0-3 7.966950000000001 7.966950000000001 7.966950000000001 ZT4-7 5.369645 5.369645 5.369645 ZT8-11 0.3865555 0.3865555 0.3865555 ZT12-15 0.2838715 0.2838715 0.2838715 ZT16-19 1.0640015 1.0640015 1.0640015 ZT20-23 4.5979399999999995 4.5979399999999995 4.5979399999999995