CSEMP assessment of CB118 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 | 68.13 | 69.77 | -31.07 | 62.13 | | | |
| linear | 2 | 68.98 | 72.18 | -30.49 | 60.98 | 1.150 | 1 | 0.2835 |
| smooth (df = 2) | 3 | 70.98 | 76.53 | -30.49 | 60.98 | 0.006 | 1 | 0.9368 |
| smooth (df = 3) | 4 | 72.91 | 81.91 | -30.45 | 60.91 | 0.070 | 1 | 0.7913 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 1.2437 | 0.0763 | -1.1674 | 1.0757 | -1.085 | 0.2991 |
| last 20 years | 2000 | 2018 | 1.2437 | 0.0763 | -1.1674 | 1.0757 | -1.085 | 0.2991 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.0793 | 0.1700 | -1.8482 | 0.6821 | -2.710 | 0.9905 |
| EAC | 1.0793 | 0.6000 | -0.5871 | 0.6821 | -0.861 | 0.7969 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
