condition mean min max ZT0-3 0.21833766666666668 0.16341250000000002 0.2460215 ZT4-7 0.07996 0.07996 0.07996 ZT8-11 0.8921319999999999 0.8921319999999999 0.8921319999999999 ZT12-15 0.87794175 0.5953965 1.160487 ZT16-19 0.5437575 0.5437575 0.5437575 ZT20-23 0.0 0.0 0.0