CSEMP assessment of chromium in sediment at Billingham-Bamlett's Bight (Tees)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 21.30 | 23.10 | -7.65 | 15.30 | | | |
| linear | 2 | 18.37 | 21.92 | -5.18 | 10.37 | 4.935 | 1 | 0.0263 |
| smooth (df = 2) | 3 | 18.05 | 24.30 | -4.02 | 8.05 | 2.321 | 1 | 0.1276 |
| smooth (df = 3) | 4 | 19.97 | 30.25 | -3.98 | 7.97 | 0.078 | 1 | 0.7794 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 4.647 | 5.667 | 1.0203 | 0.4141 | 2.464 | 0.0315 |
| last 20 years | 1999 | 2013 | 4.647 | 5.667 | 1.0203 | 0.4141 | 2.464 | 0.0315 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 289.18 | 81.00 | -1.2726 | 0.2618 | -4.860 | 0.9997 |
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
