CSEMP assessment of chromium in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 10.38 | 12.63 | -2.19 | 4.38 | | | |
| linear | 2 | 11.86 | 16.43 | -1.93 | 3.86 | 0.521 | 1 | 0.4703 |
| smooth (df = 2) | 3 | 13.83 | 22.17 | -1.92 | 3.83 | 0.026 | 1 | 0.8722 |
| smooth (df = 3) | 4 | 15.47 | 29.87 | -1.74 | 3.47 | 0.360 | 1 | 0.5486 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | 4.397 | 4.286 | -0.11105 | 0.14912 | -0.745 | 0.4755 |
| last 20 years | 2006 | 2017 | 4.397 | 4.286 | -0.11105 | 0.14912 | -0.745 | 0.4755 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 72.66 | 81.00 | 0.10864 | 0.07400 | 1.468 | 0.0881 |
Raw data with supporting information
__sdmn_cr_au.jpg "Raw data with supporting information for assessment of chromium in sediment at middle (Firth of Clyde)")
Raw data with assessment
__sdmn_cr_da.jpg "Raw data with assessment of chromium in sediment at middle (Firth of Clyde)")
Assessment plot
__sdmn_cr_as.jpg "Assessment plot for chromium in sediment at middle (Firth of Clyde)")
Metals data
__sdmn_mtlsda.jpg "Metals data for assessment of chromium in sediment at middle (Firth of Clyde)")
Metals assessment
__sdmn_mtlsas.jpg "Metals assessment of chromium in sediment at middle (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
