CSEMP assessment of BDE47 in sediment at Sea of Hebrides

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean181.49 85.99-37.7475.49
linear283.24 93.91-37.6275.240.245 10.6204
smooth (df = 2)385.07110.07-37.5475.070.170 10.6802

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
last 20 years20082015-1.6938-1.40230.29150.58760.4960.6409

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 0.25 0.05-1.593 0.386-4.1280.9954
FEQG 0.2597.50 5.982 0.38615.497<0.0001


Related pages

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