CSEMP assessment of chromium 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 | -11.65 | -9.65 | 8.82 | -17.65 | | | |
| linear | 2 | -9.69 | -5.69 | 8.84 | -17.69 | 0.040 | 1 | 0.8422 |
| smooth (df = 2) | 3 | -7.91 | -0.76 | 8.95 | -17.91 | 0.221 | 1 | 0.6385 |
| smooth (df = 3) | 4 | -10.63 | 1.37 | 11.31 | -22.63 | 4.723 | 1 | 0.0298 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2004 | 2016 | 4.477 | 4.451 | -0.02653 | 0.13321 | -0.199 | 0.8461 |
| last 20 years | 2004 | 2016 | 4.477 | 4.451 | -0.02653 | 0.13321 | -0.199 | 0.8461 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 85.7 | 81.0 | -0.05640 | 0.10294 | -0.548 | 0.7021 |
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
