Projects

CSEMP assessment of chrysene in sediment at outer (Firth of Clyde)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean193.9895.36-43.9987.98
linear290.7193.38-41.3682.71 5.265 10.0218
smooth (df = 2)380.7185.26-35.3670.7111.999 10.0005
smooth (df = 3)482.3589.55-35.1870.35 0.359 10.5491
smooth (df = 4)576.1887.07-31.0962.18 8.172 10.0043

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020174.6174.049-0.5686 0.1767-3.2170.0067
last 20 years200020174.6174.049-0.5686 0.1767-3.2170.0067

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 57.3 20.0-1.0530 0.1473-7.1481.0000
ERL 57.3384.0 1.9019 0.147312.911<0.0001

 


Related pages

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