CSEMP assessment of arsenic in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 210.87 | 213.12 | -102.43 | 204.87 | | | |
| linear | 2 | 211.59 | 216.16 | -101.79 | 203.59 | 1.280 | 1 | 0.2579 |
| smooth (df = 2) | 3 | 212.46 | 220.80 | -101.23 | 202.46 | 1.126 | 1 | 0.2886 |
| smooth (df = 3) | 4 | 211.11 | 225.51 | -99.56 | 199.11 | 3.350 | 1 | 0.0672 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2016 | 2.3390 | 2.5879 | 0.24886 | 0.21904 | 1.136 | 0.2852 |
| last 20 years | 2006 | 2016 | 2.3390 | 2.5879 | 0.24886 | 0.21904 | 1.136 | 0.2852 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 13.302 | 25.000 | 0.6310 | 0.1203 | 5.246 | 0.0003 |
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
