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 | 95.06 | 96.26 | -44.53 | 89.06 | | | |
| linear | 2 | 94.74 | 97.02 | -43.37 | 86.74 | 2.318 | 1 | 0.1279 |
| smooth (df = 2) | 3 | 96.36 | 100.21 | -43.18 | 86.36 | 0.374 | 1 | 0.5407 |
| smooth (df = 3) | 4 | 97.92 | 103.92 | -42.96 | 85.92 | 0.447 | 1 | 0.5036 |
| smooth (df = 4) | 5 | 99.07 | 107.98 | -42.53 | 85.07 | 0.847 | 1 | 0.3575 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 0.5806 | -0.1254 | -0.7059 | 0.4565 | -1.546 | 0.1416 |
| last 20 years | 2000 | 2018 | 0.5806 | -0.1254 | -0.7059 | 0.4565 | -1.546 | 0.1416 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.8822 | 0.2200 | -1.3888 | 0.2986 | -4.651 | 0.9999 |
| EAC | 0.8822 | 1.7000 | 0.6560 | 0.2986 | 2.197 | 0.0216 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
