CSEMP assessment of zinc in biota at New Brighton (Mersey)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -0.35 | 2.65 | 3.18 | -6.35 | | | |
| linear | 2 | -0.33 | 6.07 | 4.16 | -8.33 | 1.976 | 1 | 0.1598 |
| smooth (df = 2) | 3 | -0.08 | 12.42 | 5.04 | -10.08 | 1.756 | 1 | 0.1851 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2017 | 10.207 | 10.001 | -0.20586 | 0.13926 | -1.478 | 0.1829 |
| last 20 years | 2002 | 2017 | 10.207 | 10.001 | -0.20586 | 0.13926 | -1.478 | 0.1829 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 22057 | 10269 | -0.7645 | 0.0813 | -9.407 | 1.0000 |
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
