13.6 Is there an interaction? Each of the following tables gives means for a two-way ANOVA. Make a plot of the means with the levels of Factor A on the x axis. State whether or not there is an interaction, and if there is, describe it.

  1. Factor A
    Factor B123
    1112131
    261116
  2. Factor A
    Factor B123
    110515
    2201525
  3. Factor A
    Factor B123
    1101520
    2152025
  4. Factor A
    Factor B123
    1101520
    2201510