CSEMP assessment of CB118 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 | 86.58 | 87.86 | -40.29 | 80.58 | | | |
| linear | 2 | 88.29 | 90.75 | -40.14 | 80.29 | 0.290 | 1 | 0.5901 |
| smooth (df = 2) | 3 | 89.32 | 93.49 | -39.66 | 79.32 | 0.966 | 1 | 0.3257 |
| smooth (df = 3) | 4 | 91.16 | 97.71 | -39.58 | 79.16 | 0.161 | 1 | 0.6880 |
| smooth (df = 4) | 5 | 92.44 | 102.24 | -39.22 | 78.44 | 0.723 | 1 | 0.3950 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 0.8177 | 0.5792 | -0.2385 | 0.4417 | -0.540 | 0.5971 |
| last 20 years | 2000 | 2017 | 0.8177 | 0.5792 | -0.2385 | 0.4417 | -0.540 | 0.5971 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.7845 | 0.1700 | -2.3511 | 0.2870 | -8.191 | 1.0000 |
| EAC | 1.7845 | 0.6000 | -1.0900 | 0.2870 | -3.797 | 0.9991 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
