condition mean min max ZT0-3 0.6099849282500001 0.4738269865 0.74614287 ZT4-7 0.0 0.0 0.0 ZT8-11 0.47398034325000005 0.154229883 0.7937308035000001 ZT12-15 0.56083032875 0.28699211850000006 0.834668539 ZT16-19 2.81049842475 2.681842026 2.9391548235 ZT20-23 2.7208797065 2.196680103 3.24507931