CSEMP assessment of nickel in sediment at Lough Foyle
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 4.12 | 6.37 | 0.94 | -1.88 | | | |
| linear | 2 | 4.19 | 8.76 | 1.91 | -3.81 | 1.937 | 1 | 0.1639 |
| smooth (df = 2) | 3 | 5.72 | 14.05 | 2.14 | -4.28 | 0.466 | 1 | 0.4948 |
| smooth (df = 3) | 4 | 7.54 | 21.94 | 2.23 | -4.46 | 0.180 | 1 | 0.6712 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2017 | 3.616 | 3.209 | -0.4076 | 0.2810 | -1.451 | 0.1807 |
| last 20 years | 2003 | 2017 | 3.616 | 3.209 | -0.4076 | 0.2810 | -1.451 | 0.1807 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 24.74 | 36.00 | 0.3749 | 0.1546 | 2.425 | 0.0191 |
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
