CSEMP assessment of CB153 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 | -26.91 | -23.31 | 16.46 | -32.91 | | | |
| linear | 2 | -25.12 | -17.12 | 16.56 | -33.12 | 0.208 | 1 | 0.6481 |
| smooth (df = 2) | 3 | -31.07 | -14.40 | 20.53 | -41.07 | 7.946 | 1 | 0.0048 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 0.7645 | 0.7132 | -0.05131 | 0.11241 | -0.456 | 0.6641 |
| last 20 years | 1999 | 2013 | 0.7645 | 0.7132 | -0.05131 | 0.11241 | -0.456 | 0.6641 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 2.04 | 0.19 | -2.3739 | 0.0811 | -29.268 | 1.0000 |
| EAC | 2.04 | 40.00 | 2.9757 | 0.0811 | 36.687 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
