EXAMPLE 9.2 Social Media in the Supply Chain

Here is the two-way table classifying companies by size and whether or not they use social media:

Check that this table simply rearranges the information in Example 9.1.

Because we are interested in how company size influences social media use, we view company size as an explanatory variable and social media use as a response variable. This is why we put company size in the columns (like the x axis in a scat-terplot) and social media use in the rows (like the y axis in a scatterplot).