CSEMP assessment of chromium in sediment at Celtic Deep
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -33.05 | -31.05 | 19.52 | -39.05 | | | |
| linear | 2 | -35.14 | -31.14 | 21.57 | -43.14 | 4.089 | 1 | 0.0432 |
| smooth (df = 2) | 3 | -33.23 | -26.09 | 21.61 | -43.23 | 0.093 | 1 | 0.7601 |
| smooth (df = 3) | 4 | -31.69 | -19.69 | 21.85 | -43.69 | 0.463 | 1 | 0.4963 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2016 | 4.300 | 4.476 | 0.17623 | 0.08715 | 2.022 | 0.0707 |
| last 20 years | 1999 | 2016 | 4.300 | 4.476 | 0.17623 | 0.08715 | 2.022 | 0.0707 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 87.88 | 81.00 | -0.08157 | 0.06044 | -1.349 | 0.8965 |
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
