condition mean min max ZT0-3 7.0230250000000005 7.0230250000000005 7.0230250000000005 ZT4-7 2.324115 2.324115 2.324115 ZT8-11 1.7121 1.7121 1.7121 ZT12-15 1.654865 1.654865 1.654865 ZT16-19 2.255135 2.255135 2.255135 ZT20-23 7.317435 7.317435 7.317435