CSEMP assessment of CB153 in biota at Roa Island (Morecambe Bay)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 26.84 | 29.41 | -10.42 | 20.84 | | | |
| linear | 2 | 26.22 | 31.55 | -9.11 | 18.22 | 2.619 | 1 | 0.1056 |
| smooth (df = 2) | 3 | 28.12 | 38.12 | -9.06 | 18.12 | 0.095 | 1 | 0.7576 |
| smooth (df = 3) | 4 | 28.25 | 46.25 | -8.12 | 16.25 | 1.875 | 1 | 0.1709 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2015 | 0.3376 | -0.2793 | -0.6170 | 0.3742 | -1.649 | 0.1378 |
| last 20 years | 1999 | 2015 | 0.3376 | -0.2793 | -0.6170 | 0.3742 | -1.649 | 0.1378 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.756 | 0.098 | -2.045 | 0.254 | -8.050 | 1.0000 |
| EAC | 0.756 | 20.605 | 3.305 | 0.254 | 13.007 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
