condition mean min max ZT0-3 0.40256375 0.366159 0.4389685 ZT4-7 2.9749800000000004 2.9749800000000004 2.9749800000000004 ZT8-11 1.2432850000000002 1.2432850000000002 1.2432850000000002 ZT12-15 0 0 0 ZT16-19 8.124027 8.124027 8.124027 ZT20-23 0.48288200000000003 0.48288200000000003 0.48288200000000003