CSEMP assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 49.79 | 51.59 | -21.90 | 43.79 | | | |
| linear | 2 | 51.52 | 55.07 | -21.76 | 43.52 | 0.272 | 1 | 0.6022 |
| smooth (df = 2) | 3 | 53.43 | 59.68 | -21.72 | 43.43 | 0.088 | 1 | 0.7666 |
| smooth (df = 3) | 4 | 53.72 | 64.01 | -20.86 | 41.72 | 1.709 | 1 | 0.1911 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2013 | 5.347 | 5.153 | -0.1939 | 0.3713 | -0.522 | 0.6118 |
| last 20 years | 2000 | 2013 | 5.347 | 5.153 | -0.1939 | 0.3713 | -0.522 | 0.6118 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 172.9 | 16.0 | -2.3801 | 0.2238 | -10.637 | 1.0000 |
| ERL | 172.9 | 261.0 | 0.4118 | 0.2238 | 1.840 | 0.0464 |
Raw data with supporting information
![Raw data with supporting information for assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_f_02_sdmn_baa_au.jpg "Raw data with supporting information for assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)")
Raw data with assessment
![Raw data with assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_f_02_sdmn_baa_da.jpg "Raw data with assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)")
Assessment plot
![Assessment plot for benzo[a]anthracene in sediment at Skelmorlie (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_f_02_sdmn_baa_as.jpg "Assessment plot for benzo[a]anthracene in sediment at Skelmorlie (Clyde)")
PAH (parent) data
![PAH (parent) data for assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_f_02_sdmn_p(p)da.jpg "PAH (parent) data for assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)")
PAH (parent) assessment
![PAH (parent) assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_f_02_sdmn_p(p)as.jpg "PAH (parent) assessment of benzo[a]anthracene in sediment at Skelmorlie (Clyde)")
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