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Table 2 AIC statistics for models of tick treatment effects on tick drag sample abundances 1

From: The effectiveness of permethrin-treated deer stations for control of the Lyme disease vector Ixodes scapularis on Cape Cod and the islands: a five-year experiment

Model (fixed effects) Log likelihood K 2 ΔAICc AICc weight
Stage + Trt × Year -7757.3 8 0.0 0.40
Stage + Year -7759.3 6 0.1 0.39
Stage + Trt + Year -7758.9 7 1.3 0.21
Stage + Trt × Day -7761.8 8 9.0 0.00
Stage + Day -7764.1 6 9.7 0.00
Stage + Trt + Day -7763.7 7 10.9 0.00
Stage -7772.3 5 24.1 0.00
Stage + Trt -7772.0 6 25.5 0.00
  1. 1Data are from the 2007, 2009 and 2011 cohort of blacklegged ticks in a 4-poster study in southeastern Massachusetts. See Section 2.2 of Burnham and Anderson [20] for an explanation of AIC statistics.
  2. 2k is number of parameters in the model.