CSEMP assessment of lead in biota at Off Boston (Wash)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 5.91 | 7.91 | 0.05 | -0.09 | | | |
| linear | 2 | 7.57 | 11.57 | 0.22 | -0.43 | 0.338 | 1 | 0.5611 |
| smooth (df = 2) | 3 | 4.77 | 11.91 | 2.61 | -5.23 | 4.797 | 1 | 0.0285 |
| smooth (df = 3) | 4 | 5.39 | 17.39 | 3.30 | -6.61 | 1.376 | 1 | 0.2407 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2018 | 5.779 | 5.608 | -0.17146 | 0.29259 | -0.586 | 0.5709 |
| last 20 years | 1999 | 2018 | 5.779 | 5.608 | -0.17146 | 0.29259 | -0.586 | 0.5709 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 272.5 | 211.9 | -0.2515 | 0.1764 | -1.426 | 0.9078 |
| EC | 272.5 | 1500.0 | 1.7056 | 0.1764 | 9.669 | <0.0001 |
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
