| T | df | Sig. (2-tailed) | Mean | 95% Confidence interval of the difference | |||
| Lower | Upper | ||||||
| Test Value = 0.005 | |||||||
| Cadmium summer | −45 | 100 | 0.000 | −0.0037895 | −0.003952 | −0.003627 | |
| Cadmium spring | −34 | 99 | 0.000 | −0.0038800 | −0.004102 | −0.003658 | |
|
| Test Value = 0.01 | ||||||
| Lead summer | −8 | 199 | 0.000 | −0.0043980 | −0.005456 | −0.003340 | |
| Lead spring | −10 | 99 | 0.000 | −0.0060850 | −0.007211 | −0.004959 | |