CSEMP assessment of lead in biota at Conwy Sands (Conwy Bay)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -8.49 | 0.51 | 7.25 | -14.49 | | | |
| linear | 2 | -6.92 | 25.08 | 7.46 | -14.92 | 0.422 | 1 | 0.5162 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2012 | 2018 | 6.083 | 6.011 | -0.07136 | 0.10895 | -0.655 | 0.5592 |
| last 20 years | 2012 | 2018 | 6.083 | 6.011 | -0.07136 | 0.10895 | -0.655 | 0.5592 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 408.0 | 211.9 | -0.6551 | 0.0742 | -8.828 | 0.9985 |
| EC | 408.0 | 1500.0 | 1.3020 | 0.0742 | 17.545 | 0.0002 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Metals data
Metals assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in biota
- Accessment criteria for metals in biota
