Projects

CSEMP assessment of benzo[a]anthracene in sediment at Forth Estuary

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean171.8774.12-32.9465.87
linear273.6278.19-32.8165.620.253 10.6150
smooth (df = 2)374.2882.61-32.1464.281.342 10.2466
smooth (df = 3)476.2790.67-32.1464.270.005 10.9425

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020185.2204.859-0.3606 0.7129-0.5060.6252
last 20 years200020185.2204.859-0.3606 0.7129-0.5060.6252

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC128.91 16.00-2.0866 0.4219-4.9450.9996
ERL128.91261.00 0.7054 0.4219 1.6720.0644

 


Related pages

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