CSEMP assessment of arsenic 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 | 24.06 | 27.66 | -9.03 | 18.06 | | | |
| linear | 2 | 26.06 | 34.06 | -9.03 | 18.06 | 0.007 | 1 | 0.9353 |
| smooth (df = 2) | 3 | 24.13 | 40.79 | -7.06 | 14.13 | 3.929 | 1 | 0.0475 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2013 | 1.4576 | 1.4809 | 0.02336 | 0.28735 | 0.081 | 0.9378 |
| last 20 years | 2006 | 2013 | 1.4576 | 1.4809 | 0.02336 | 0.28735 | 0.081 | 0.9378 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 4.397 | 25.000 | 1.7379 | 0.1730 | 10.047 | <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
