CSEMP assessment of CB138 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 | 19.11 | 22.11 | -6.56 | 13.11 | | | |
| linear | 2 | 16.33 | 22.73 | -4.17 | 8.33 | 4.783 | 1 | 0.0287 |
| smooth (df = 2) | 3 | 18.12 | 30.62 | -4.06 | 8.12 | 0.208 | 1 | 0.6487 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2015 | 0.1403 | -0.5846 | -0.7249 | 0.3110 | -2.331 | 0.0526 |
| last 20 years | 1999 | 2015 | 0.1403 | -0.5846 | -0.7249 | 0.3110 | -2.331 | 0.0526 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.557 | 0.098 | -1.7402 | 0.2248 | -7.740 | 0.9999 |
| EAC | 0.557 | 4.121 | 2.0007 | 0.2248 | 8.898 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
