CSEMP assessment of CB138 in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 20.38 | 22.02 | -7.19 | 14.38 | | | |
| linear | 2 | 22.35 | 25.55 | -7.18 | 14.35 | 0.028 | 1 | 0.8675 |
| smooth (df = 2) | 3 | 19.76 | 25.32 | -4.88 | 9.76 | 4.589 | 1 | 0.0322 |
| smooth (df = 3) | 4 | 19.13 | 28.13 | -3.56 | 7.13 | 2.637 | 1 | 0.1044 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 1.3591 | 1.4374 | 0.0783 | 0.4688 | 0.167 | 0.8701 |
| last 20 years | 2000 | 2017 | 1.3591 | 1.4374 | 0.0783 | 0.4688 | 0.167 | 0.8701 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 4.21 | 0.15 | -3.335 | 0.302 | -11.045 | 1.0000 |
| EAC | 4.21 | 7.90 | 0.629 | 0.302 | 2.085 | 0.0295 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
