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 | 105.38 | 107.38 | -49.69 | 99.38 | | | |
| linear | 2 | 99.25 | 103.25 | -45.63 | 91.25 | 8.124 | 1 | 0.0044 |
| smooth (df = 2) | 3 | 101.25 | 108.39 | -45.63 | 91.25 | 0.001 | 1 | 0.9703 |
| smooth (df = 3) | 4 | 102.63 | 114.63 | -45.32 | 90.63 | 0.618 | 1 | 0.4317 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | -1.8537 | -0.6924 | 1.1613 | 0.3627 | 3.202 | 0.0095 |
| last 20 years | 2000 | 2017 | -1.8537 | -0.6924 | 1.1613 | 0.3627 | 3.202 | 0.0095 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.5004 | 0.1200 | -1.4279 | 0.1412 | -10.111 | 1.0000 |
| EAC | 0.5004 | 2.7000 | 1.6856 | 0.1412 | 11.936 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
