CSEMP assessment of lead 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 | -8.97 | -6.72 | 7.48 | -14.97 | | | |
| linear | 2 | -7.03 | -2.46 | 7.52 | -15.03 | 0.068 | 1 | 0.7946 |
| smooth (df = 2) | 3 | -6.14 | 2.20 | 8.07 | -16.14 | 1.102 | 1 | 0.2939 |
| smooth (df = 3) | 4 | -10.25 | 4.15 | 11.13 | -22.25 | 6.116 | 1 | 0.0134 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | 3.922 | 3.884 | -0.03797 | 0.14107 | -0.269 | 0.7939 |
| last 20 years | 2006 | 2017 | 3.922 | 3.884 | -0.03797 | 0.14107 | -0.269 | 0.7939 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 48.61 | 38.00 | -0.24619 | 0.07198 | -3.420 | 0.9962 |
| ERL | 48.61 | 47.00 | -0.03363 | 0.07198 | -0.467 | 0.6743 |
Raw data with supporting information
__sdmn_pb_au.jpg "Raw data with supporting information for assessment of lead in sediment at middle (Firth of Clyde)")
Raw data with assessment
__sdmn_pb_da.jpg "Raw data with assessment of lead in sediment at middle (Firth of Clyde)")
Assessment plot
__sdmn_pb_as.jpg "Assessment plot for lead in sediment at middle (Firth of Clyde)")
Metals data
__sdmn_mtlsda.jpg "Metals data for assessment of lead in sediment at middle (Firth of Clyde)")
Metals assessment
__sdmn_mtlsas.jpg "Metals assessment of lead 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
