Projects

CSEMP assessment of benzo[a]pyrene in sediment at Lough Foyle

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean1129.89131.89-61.94123.89
linear2128.52132.52-60.26120.523.372 10.0663
smooth (df = 2)3122.48129.63-56.24112.488.034 10.0046
smooth (df = 3)4123.35135.35-55.68111.351.129 10.2880

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020185.0373.906-1.1311 0.4311-2.6240.0276
last 20 years200020185.0373.906-1.1311 0.4311-2.6240.0276

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 49.7 30.0-0.5047 0.3139-1.6080.9288
ERL 49.7430.0 2.1579 0.3139 6.875<0.0001

 


Related pages

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