CSEMP assessment of cadmium in sediment at North Minch
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 82.13 | 85.13 | -38.07 | 76.13 | | | |
| linear | 2 | 82.32 | 88.72 | -37.16 | 74.32 | 1.810 | 1 | 0.1785 |
| smooth (df = 2) | 3 | 83.92 | 96.42 | -36.96 | 73.92 | 0.407 | 1 | 0.5233 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2008 | 2017 | -2.6275 | -2.1232 | 0.5043 | 0.3731 | 1.352 | 0.2185 |
| last 20 years | 2008 | 2017 | -2.6275 | -2.1232 | 0.5043 | 0.3731 | 1.352 | 0.2185 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.1197 | 0.3100 | 0.9520 | 0.2150 | 4.427 | 0.0015 |
| ERL | 0.1197 | 1.2000 | 2.3055 | 0.2150 | 10.721 | <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
