CSEMP assessment of arsenic 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 | 56.13 | 58.38 | -25.06 | 50.13 | | | |
| linear | 2 | 56.23 | 60.80 | -24.11 | 48.23 | 1.900 | 1 | 0.1681 |
| smooth (df = 2) | 3 | 57.67 | 66.01 | -23.84 | 47.67 | 0.554 | 1 | 0.4566 |
| smooth (df = 3) | 4 | 58.86 | 73.26 | -23.43 | 46.86 | 0.812 | 1 | 0.3675 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2016 | 1.6196 | 1.8729 | 0.25324 | 0.17839 | 1.420 | 0.1894 |
| last 20 years | 2006 | 2016 | 1.6196 | 1.8729 | 0.25324 | 0.17839 | 1.420 | 0.1894 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 6.507 | 25.000 | 1.346 | 0.104 | 12.942 | <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
