Visualizing Load Time vs. Session Duration with a Third Variable
Tests your ability to visualize correlation and add dimensions. A great answer suggests a scatter plot for the initial relationship, then uses color to segment by the categorical third variable (network type).
This question tests your data literacy: can you select the right visualization for correlation and then layer in more complexity? A strong answer starts with a scatter plot (load time vs. session duration). It then explains how to use color to encode the categorical third variable (network type), showing two distinct groups on the same plot. A common mistake is suggesting a bar chart, which obscures the point-by-point correlation, or incorrectly using bubble size for a non-metric dimension like network type.
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