condition mean min max ZT0-3 0.68334336125 0.625338786 0.7413479365 ZT4-7 0.06918241825 0.043384755 0.09498008150000001 ZT8-11 2.07317301775 0.024025222000000002 4.1223208135 ZT12-15 18.45843238375 14.4294506225 22.487414145000002 ZT16-19 13.496119394499999 10.291945624 16.700293164999998 ZT20-23 4.601472660500001 3.739090225 5.4638550960000005