CSEMP assessment of CB28 in biota at Crosby (Mersey Channel)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 26.25 | 29.25 | -10.12 | 20.25 | | | |
| linear | 2 | 25.66 | 32.06 | -8.83 | 17.66 | 2.591 | 1 | 0.1075 |
| smooth (df = 2) | 3 | 24.62 | 37.12 | -7.31 | 14.62 | 3.042 | 1 | 0.0812 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2018 | -0.3114 | -0.9338 | -0.6224 | 0.3549 | -1.754 | 0.1229 |
| last 20 years | 2002 | 2018 | -0.3114 | -0.9338 | -0.6224 | 0.3549 | -1.754 | 0.1229 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.3931 | 0.1223 | -1.1679 | 0.2146 | -5.442 | 0.9995 |
| EAC | 0.3931 | 0.8710 | 0.7957 | 0.2146 | 3.708 | 0.0038 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
