Projects

CSEMP assessment of pyrene in sediment at Lough Foyle

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean1122.90124.90-58.45116.90
linear2118.39122.39-55.19110.39 6.514 10.0107
smooth (df = 2)3109.48116.62-49.74 99.4810.907 10.0010
smooth (df = 3)4110.96122.96-49.48 98.96 0.519 10.4714

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020186.0024.257-1.7454 0.3915-4.4580.0016
last 20 years200020186.0024.257-1.7454 0.3915-4.4580.0016

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 70.6 24.0-1.0788 0.2845-3.7920.9979
ERL 70.6665.0 2.2429 0.2845 7.884<0.0001

 


Related pages

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