Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2180-6-80/MediaObjects/12866_2006_Article_293_Fig1_HTML.jpg)
Possible effects of bacterial strain and F-plasmid in a 2 × 2 analysis of variance (ANOVA). a) -c): cases with no interaction effect. d): examples of some possible interaction effects.
Possible effects of bacterial strain and F-plasmid in a 2 × 2 analysis of variance (ANOVA). a) -c): cases with no interaction effect. d): examples of some possible interaction effects.