Table 4 Mean differences of the metal concentrations and lower and upper 95% confidence intervals (CI) from the Tukey HSD post hoc comparisons among the three levels of pollution degree.
As | Mean difference | 95% CI | Upper | P |
|---|---|---|---|---|
Lower | ||||
Low-High | −68.103 | −102.159 | −34.047 | 0.000 |
Medium-High | −76.535 | −115.199 | −37.871 | 0.000 |
Medium-Low | −8.431 | −42.951 | 26.087 | 0.830 |
Cu | ||||
Low-High | −11.708 | −17.475 | −5.942 | 0.000 |
Medium-High | −25.318 | −31.865 | −18.771 | 0.000 |
Medium-Low | −13.609 | −19.455 | −7.764 | 0.000 |
Mn | ||||
Low-High | −236.659 | −435.378 | −37.939 | 0.015 |
Medium-High | −406.422 | −632.033 | −180.812 | 0.000 |
Medium-Low | −169.763 | −371.189 | 31.661 | 0.116 |
Ni | ||||
Low-High | −8.128 | −21.3107 | 5.052 | 0.310 |
Medium-High | 2.127 | −1.283 | 17.093 | 0.939 |
Medium-Low | 10.256 | −3.104 | 23.617 | 0.166 |
Pb | ||||
Low-High | −109.746 | −14.294 | −76.543 | 0.000 |
Medium-High | −146.404 | −184.100 | −108.708 | 0.000 |
Medium-Low | −36.658 | −70.313 | −3.003 | 0.029 |
Zn | ||||
Low-High | −12.850 | −212.791 | 187.089 | 0.987 |
Medium-High | 300.657 | 73.660 | 527.655 | 0.006 |
Medium-Low | 313.508 | 110.844 | 516.172 | 0.001 |
