CSEMP assessment of lead in sediment at Fladen Ground
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -13.87 | -10.27 | 9.94 | -19.87 | | | |
| linear | 2 | -11.88 | -3.88 | 9.94 | -19.88 | 0.006 | 1 | 0.9370 |
| smooth (df = 2) | 3 | -9.91 | 6.76 | 9.95 | -19.91 | 0.028 | 1 | 0.8676 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2013 | 3.0983 | 3.0841 | -0.01421 | 0.17767 | -0.080 | 0.9389 |
| last 20 years | 2006 | 2013 | 3.0983 | 3.0841 | -0.01421 | 0.17767 | -0.080 | 0.9389 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 21.85 | 38.00 | 0.5535 | 0.1103 | 5.017 | 0.0012 |
| ERL | 21.85 | 47.00 | 0.7661 | 0.1103 | 6.943 | 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 sediment
- Accessment criteria for metals in sediment
