CSEMP assessment of CB28 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 | -15.80 | -11.30 | 10.90 | -21.80 | | | |
| linear | 2 | -15.99 | -5.32 | 11.99 | -23.99 | 2.182 | 1 | 0.1396 |
| smooth (df = 2) | 3 | -14.88 | 10.12 | 12.44 | -24.88 | 0.897 | 1 | 0.3435 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 0.23369 | -0.07295 | -0.30664 | 0.19237 | -1.594 | 0.1718 |
| last 20 years | 1999 | 2013 | 0.23369 | -0.07295 | -0.30664 | 0.19237 | -1.594 | 0.1718 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.9296 | 0.2200 | -1.4412 | 0.1413 | -10.196 | 0.9999 |
| EAC | 0.9296 | 1.7000 | 0.6036 | 0.1413 | 4.270 | 0.0040 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
