CSEMP assessment of benzo[a]anthracene 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 | 53.60 | 56.17 | -23.80 | 47.60 | | | |
| linear | 2 | 54.41 | 59.74 | -23.20 | 46.41 | 1.192 | 1 | 0.2750 |
| smooth (df = 2) | 3 | 55.61 | 65.61 | -22.80 | 45.61 | 0.800 | 1 | 0.3712 |
| smooth (df = 3) | 4 | 46.03 | 64.03 | -17.02 | 34.03 | 11.578 | 1 | 0.0007 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | 4.380 | 4.107 | -0.27211 | 0.22741 | -1.197 | 0.2657 |
| last 20 years | 2006 | 2017 | 4.380 | 4.107 | -0.27211 | 0.22741 | -1.197 | 0.2657 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 60.79 | 16.00 | -1.3349 | 0.1379 | -9.680 | 1.0000 |
| ERL | 60.79 | 261.00 | 1.4571 | 0.1379 | 10.566 | <0.0001 |
Raw data with supporting information
![Raw data with supporting information for assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_frth_f_clyd_(m)__sdmn_baa_au.jpg "Raw data with supporting information for assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)")
Raw data with assessment
![Raw data with assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_frth_f_clyd_(m)__sdmn_baa_da.jpg "Raw data with assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)")
Assessment plot
![Assessment plot for benzo[a]anthracene in sediment at middle (Firth of Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_frth_f_clyd_(m)__sdmn_baa_as.jpg "Assessment plot for benzo[a]anthracene in sediment at middle (Firth of Clyde)")
PAH (parent) data
![PAH (parent) data for assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_frth_f_clyd_(m)__sdmn_p(p)da.jpg "PAH (parent) data for assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)")
PAH (parent) assessment
![PAH (parent) assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_frth_f_clyd_(m)__sdmn_p(p)as.jpg "PAH (parent) assessment of benzo[a]anthracene in sediment at middle (Firth of Clyde)")
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