CSEMP assessment of CB28 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 | 93.39 | 94.67 | -43.69 | 87.39 | | | |
| linear | 2 | 93.51 | 95.97 | -42.76 | 85.51 | 1.874 | 1 | 0.1711 |
| smooth (df = 2) | 3 | 95.02 | 99.19 | -42.51 | 85.02 | 0.493 | 1 | 0.4826 |
| smooth (df = 3) | 4 | 96.05 | 102.60 | -42.03 | 84.05 | 0.967 | 1 | 0.3255 |
| smooth (df = 4) | 5 | 97.60 | 107.40 | -41.80 | 83.60 | 0.453 | 1 | 0.5009 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 0.5771 | -0.0779 | -0.6549 | 0.4723 | -1.387 | 0.1858 |
| last 20 years | 2000 | 2017 | 0.5771 | -0.0779 | -0.6549 | 0.4723 | -1.387 | 0.1858 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.9251 | 0.2200 | -1.4363 | 0.3058 | -4.697 | 0.9999 |
| EAC | 0.9251 | 1.7000 | 0.6085 | 0.3058 | 1.990 | 0.0326 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
