Learning objectives
Construct a two-way table for two categorical variables and calculate joint, marginal and conditional relative frequencies from it, choosing the correct total for each
Construct and interpret side-by-side bar charts, segmented bar charts and mosaic plots that compare conditional distributions
Determine whether two categorical variables are associated by comparing conditional relative frequencies across groups, and state the comparison in context
Justify or criticize a claim about two categorical variables using a table, a graph or the relevant relative frequencies, and explain why an association in observational data does not show that one variable causes the other
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