CSEMP assessment of CB138 in sediment at Inner Firth of Clyde, Nth of Cumbrae
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -15.79 | -11.29 | 10.89 | -21.79 | | | |
| linear | 2 | -18.39 | -7.72 | 13.19 | -26.39 | 4.599 | 1 | 0.0320 |
| smooth (df = 2) | 3 | -18.43 | 6.57 | 14.21 | -28.43 | 2.039 | 1 | 0.1533 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 0.8141 | 0.4797 | -0.3344 | 0.1305 | -2.562 | 0.0505 |
| last 20 years | 1999 | 2013 | 0.8141 | 0.4797 | -0.3344 | 0.1305 | -2.562 | 0.0505 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.616 | 0.150 | -2.3768 | 0.1061 | -22.397 | 1.0000 |
| EAC | 1.616 | 7.900 | 1.5871 | 0.1061 | 14.956 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
