CSEMP assessment of chromium in sediment at outer (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -18.66 | -17.27 | 12.33 | -24.66 | | | |
| linear | 2 | -28.89 | -26.22 | 18.44 | -36.89 | 12.231 | 1 | 0.0005 |
| smooth (df = 2) | 3 | -39.77 | -35.22 | 24.88 | -49.77 | 12.882 | 1 | 0.0003 |
| smooth (df = 3) | 4 | -38.00 | -30.80 | 25.00 | -50.00 | 0.230 | 1 | 0.6319 |
| smooth (df = 4) | 5 | -36.12 | -25.23 | 25.06 | -50.12 | 0.118 | 1 | 0.7316 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2016 | 5.214 | 4.355 | -0.8596 | 0.1470 | -5.849 | <0.0001 |
| last 20 years | 2000 | 2016 | 5.214 | 4.355 | -0.8596 | 0.1470 | -5.849 | <0.0001 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 77.85 | 81.00 | 0.03966 | 0.12430 | 0.319 | 0.3774 |
Raw data with supporting information
__sdmn_cr_au.jpg "Raw data with supporting information for assessment of chromium in sediment at outer (Firth of Clyde)")
Raw data with assessment
__sdmn_cr_da.jpg "Raw data with assessment of chromium in sediment at outer (Firth of Clyde)")
Assessment plot
__sdmn_cr_as.jpg "Assessment plot for chromium in sediment at outer (Firth of Clyde)")
Metals data
__sdmn_mtlsda.jpg "Metals data for assessment of chromium in sediment at outer (Firth of Clyde)")
Metals assessment
__sdmn_mtlsas.jpg "Metals assessment of chromium in sediment at outer (Firth of Clyde)")
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in sediment
- Accessment criteria for metals in sediment
