CSEMP assessment of CB118 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 | -30.17 | -26.57 | 18.09 | -36.17 | | | |
| linear | 2 | -28.18 | -20.18 | 18.09 | -36.18 | 0.002 | 1 | 0.9626 |
| smooth (df = 2) | 3 | -28.57 | -11.91 | 19.29 | -38.57 | 2.398 | 1 | 0.1215 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 0.4206 | 0.4262 | 0.00556 | 0.11858 | 0.047 | 0.9641 |
| last 20 years | 1999 | 2013 | 0.4206 | 0.4262 | 0.00556 | 0.11858 | 0.047 | 0.9641 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.5314 | 0.1700 | -2.1981 | 0.0858 | -25.632 | 1.0000 |
| EAC | 1.5314 | 0.6000 | -0.9370 | 0.0858 | -10.926 | 1.0000 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
