Here’s how to enter these mean values into Excel: Suppose we collect data on 60 plants and calculate the mean plant growth at each level of sunlight exposure and watering frequency. weekly) on the growth of a certain species of plant. Suppose we want to understand the effects of sunlight exposure (low vs. The following step-by-step example shows how to create and interpret an interaction plot in Excel. A 2×2 factorial design is used to understand how two independent variables (each with two levels) affect one dependent variable.Ī useful way to visualize the effects that the two independent variables have on the dependent variable is to create an interaction plot, which displays the mean value of the dependent variable at each level of the independent variables.
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