CSEMP assessment of benzo[a]anthracene in sediment at SE of Bressay (Shetland)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean1 99.71104.21-46.8693.71
linear2101.60112.27-46.8093.600.110 10.7400
smooth (df = 2)3103.46128.46-46.7393.460.144 10.7044

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200620161.79031.5369-0.2534 0.7630-0.3320.7533
last 20 years200620161.79031.5369-0.2534 0.7630-0.3320.7533

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 4.65 16.001.2360.4862.5430.0259
ERL 4.65261.004.0280.4868.2880.0002


Related pages

  • Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
  • Assessment methodology for in sediment
  • Accessment criteria for in sediment