condition mean min max ZT0-3 1.4264441145 0.100532934 2.752355295 ZT4-7 7.13917512125 4.4346424585 9.843707784 ZT8-11 17.708346767000002 13.726154049 21.690539485000002 ZT12-15 19.200797995000002 17.522786525 20.878809465 ZT16-19 10.201341113249999 10.0055451105 10.397137116 ZT20-23 11.67516898025 10.7041155555 12.646222405