condition mean min max ZT0-3 9.681288207166666 6.612555 14.7861996215 ZT4-7 9.12401 9.12401 9.12401 ZT8-11 6.930794000000001 6.930794000000001 6.930794000000001 ZT12-15 5.8199825 4.638215000000001 7.00175 ZT16-19 0.599730004807875 0.599730004807875 0.599730004807875 ZT20-23 13.79871 13.79871 13.79871