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 | -27.29 | -23.69 | 16.65 | -33.29 | | | |
| linear | 2 | -25.76 | -17.76 | 16.88 | -33.76 | 0.469 | 1 | 0.4936 |
| smooth (df = 2) | 3 | -25.32 | -8.65 | 17.66 | -35.32 | 1.561 | 1 | 0.2116 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2013 | 3.186 | 3.128 | -0.05827 | 0.09561 | -0.609 | 0.5646 |
| last 20 years | 2006 | 2013 | 3.186 | 3.128 | -0.05827 | 0.09561 | -0.609 | 0.5646 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 22.83 | 38.00 | 0.5097 | 0.0637 | 8.008 | 0.0001 |
| ERL | 22.83 | 47.00 | 0.7223 | 0.0637 | 11.347 | <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 sediment
- Accessment criteria for metals in sediment
