condition mean min max ZT0-3 0.6430546575 0.413716086 0.872393229 ZT4-7 0.29527298949999997 0.136021023 0.454524956 ZT8-11 2.19692953775 1.3680322585 3.025826817 ZT12-15 4.01342276325 3.510206475 4.5166390515 ZT16-19 3.6197522952500005 2.909950174 4.329554416500001 ZT20-23 9.35736269175 6.8438520480000005 11.870873335499999