Projects

CSEMP assessment of mercury in sediment at inner (Firth of Clyde)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean183.2984.58-38.6577.29
linear271.9374.40-31.9763.9313.358 10.0003
smooth (df = 2)373.8277.98-31.9163.82 0.119 10.7298
smooth (df = 3)475.8082.35-31.9063.80 0.015 10.9014
smooth (df = 4)577.7687.56-31.8863.76 0.041 10.8389

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall19992016-0.4451-0.9776-0.5325 0.1208-4.4100.0005
last 20 years19992016-0.4451-0.9776-0.5325 0.1208-4.4100.0005

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC0.37620.0700-1.6816 0.0687-24.4801.0000
ERL0.37620.1500-0.9195 0.0687-13.3851.0000

 


Related pages

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