CSEMP assessment of lead 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 | -4.88 | -2.88 | 5.44 | -10.88 | | | |
| linear | 2 | -3.10 | 0.90 | 5.55 | -11.10 | 0.213 | 1 | 0.6441 |
| smooth (df = 2) | 3 | -2.15 | 4.99 | 6.07 | -12.15 | 1.052 | 1 | 0.3050 |
| smooth (df = 3) | 4 | -2.96 | 9.04 | 7.48 | -14.96 | 2.814 | 1 | 0.0934 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2004 | 2016 | 2.9585 | 3.0396 | 0.08118 | 0.17003 | 0.477 | 0.6433 |
| last 20 years | 2004 | 2016 | 2.9585 | 3.0396 | 0.08118 | 0.17003 | 0.477 | 0.6433 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 20.9 | 38.0 | 0.5980 | 0.1187 | 5.038 | 0.0003 |
| ERL | 20.9 | 47.0 | 0.8105 | 0.1187 | 6.828 | <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
