1.3 Tabular Representation and Summary Statistics for One Categorical Variable

Construct categorical one-variable tabular representations.

• A frequency table shows the number of observational units in each category of a categorical variable.
• A relative frequency table shows the proportion of observational units in each category of a categorical variable.

Describe categorical one-variable tabular representations with summary statistics.

• Percentages, relative frequencies, and ratios all provide the same information as proportions.
• Counts and relative frequencies of categorical variables reveal information that can be used to justify claims about the variables in context.