Draw a graph where a strong interaction effect is present and then draw a graph where no interaction is present- include variables that you think would be of interaction or no interaction.
Let's study the interaction effect between the Type of Food (Burger or Pasta) and the type of condiment. There is a strong interaction effect between both the variables as we can see from the below graph:
Let's study the interaction effect between the type of Drug (A or B) and Gender. We want to see if the drug is equally effective for males and females. There is no interaction found effect between the variables as shown below:
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