CSEMP assessment of CB52 in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 94.54 | 95.82 | -44.27 | 88.54 | | | |
| linear | 2 | 96.51 | 98.97 | -44.26 | 88.51 | 0.025 | 1 | 0.8732 |
| smooth (df = 2) | 3 | 93.36 | 97.52 | -41.68 | 83.36 | 5.155 | 1 | 0.0232 |
| smooth (df = 3) | 4 | 93.86 | 100.41 | -40.93 | 81.86 | 1.492 | 1 | 0.2219 |
| smooth (df = 4) | 5 | 95.65 | 105.45 | -40.82 | 81.65 | 0.214 | 1 | 0.6436 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 0.5801 | 0.4962 | -0.0839 | 0.5253 | -0.160 | 0.8753 |
| last 20 years | 2000 | 2018 | 0.5801 | 0.4962 | -0.0839 | 0.5253 | -0.160 | 0.8753 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.6425 | 0.1200 | -2.6165 | 0.3334 | -7.848 | 1.0000 |
| EAC | 1.6425 | 2.7000 | 0.4970 | 0.3334 | 1.491 | 0.0784 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
