Projects

CSEMP assessment of benzo[a]pyrene in sediment at outer (Firth of Clyde)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean1119.42120.70-56.71113.42
linear2115.07117.53-53.53107.07 6.350 10.0117
smooth (df = 2)3104.72108.89-47.36 94.7212.344 10.0004
smooth (df = 3)4106.50113.04-47.25 94.50 0.226 10.6348
smooth (df = 4)5107.36117.16-46.68 93.36 1.141 10.2854

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020174.8144.094-0.7202 0.1973-3.6500.0026
last 20 years200020174.8144.094-0.7202 0.1973-3.6500.0026

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 60 30-0.6926 0.1653-4.1910.9995
ERL 60430 1.9699 0.165311.919<0.0001

 


Related pages

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