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 | -6.14 | -4.86 | 6.07 | -12.14 | | | |
| linear | 2 | -11.15 | -8.69 | 9.57 | -19.15 | 7.004 | 1 | 0.0081 |
| smooth (df = 2) | 3 | -27.76 | -23.59 | 18.88 | -37.76 | 18.611 | 1 | <0.0001 |
| smooth (df = 3) | 4 | -25.76 | -19.21 | 18.88 | -37.76 | 0.001 | 1 | 0.9781 |
| smooth (df = 4) | 5 | -23.82 | -14.02 | 18.91 | -37.82 | 0.059 | 1 | 0.8083 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 5.226 | 4.553 | -0.6723 | 0.1412 | -4.762 | 0.0003 |
| last 20 years | 2000 | 2017 | 5.226 | 4.553 | -0.6723 | 0.1412 | -4.762 | 0.0003 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 94.96 | 81.00 | -0.15901 | 0.11472 | -1.386 | 0.9063 |
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
