CSEMP assessment of CB138 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 | -2.22 | 0.03 | 4.11 | -8.22 | | | |
| linear | 2 | -4.97 | -0.40 | 6.49 | -12.97 | 4.756 | 1 | 0.0292 |
| smooth (df = 2) | 3 | -3.91 | 4.42 | 6.96 | -13.91 | 0.940 | 1 | 0.3323 |
| smooth (df = 3) | 4 | -2.91 | 11.49 | 7.45 | -14.91 | 0.998 | 1 | 0.3178 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 1.3099 | 0.6545 | -0.6554 | 0.2662 | -2.462 | 0.0360 |
| last 20 years | 2000 | 2017 | 1.3099 | 0.6545 | -0.6554 | 0.2662 | -2.462 | 0.0360 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.924 | 0.098 | -2.9793 | 0.1619 | -18.401 | 1.0000 |
| EAC | 1.924 | 4.121 | 0.7616 | 0.1619 | 4.704 | 0.0006 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
