condition mean min max ZT0-3 1.0580764775 0.774270672 1.341882283 ZT4-7 1.456596107 1.3701794965 1.5430127175 ZT8-11 1.5184225955000001 1.3834468375000002 1.6533983534999999 ZT12-15 1.082487054 1.0408523485 1.1241217595 ZT16-19 1.37468327275 1.0573498204999998 1.692016725 ZT20-23 3.32859898275 2.8229897945 3.8342081709999998