CSEMP assessment of CB52 in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 119.67 | 121.47 | -56.84 | 113.67 | | | |
| linear | 2 | 112.46 | 116.01 | -52.23 | 104.46 | 9.216 | 1 | 0.0024 |
| smooth (df = 2) | 3 | 113.30 | 119.55 | -51.65 | 103.30 | 1.156 | 1 | 0.2822 |
| smooth (df = 3) | 4 | 112.62 | 122.91 | -50.31 | 100.62 | 2.677 | 1 | 0.1018 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | -2.0154 | -0.3987 | 1.6167 | 0.4274 | 3.783 | 0.0030 |
| last 20 years | 2000 | 2018 | -2.0154 | -0.3987 | 1.6167 | 0.4274 | 3.783 | 0.0030 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.6712 | 0.1200 | -1.7216 | 0.1749 | -9.842 | 1.0000 |
| EAC | 0.6712 | 2.7000 | 1.3919 | 0.1749 | 7.957 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
