CSEMP assessment of CB28 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 | 109.95 | 111.75 | -51.97 | 103.95 | | | |
| linear | 2 | 107.92 | 111.47 | -49.96 | 99.92 | 4.031 | 1 | 0.0447 |
| smooth (df = 2) | 3 | 91.25 | 97.50 | -40.63 | 81.25 | 18.665 | 1 | <0.0001 |
| smooth (df = 3) | 4 | 90.72 | 101.01 | -39.36 | 78.72 | 2.528 | 1 | 0.1118 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | -1.9578 | -0.8017 | 1.1560 | 0.2483 | 4.657 | 0.0009 |
| last 20 years | 2000 | 2018 | -1.9578 | -0.8017 | 1.1560 | 0.2483 | 4.657 | 0.0009 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.4485 | 0.2200 | -0.7124 | 0.1528 | -4.663 | 0.9996 |
| EAC | 0.4485 | 1.7000 | 1.3324 | 0.1528 | 8.722 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
