What type of data can PROC FREQ display?

The chosen answer is accurate because PROC FREQ in SAS is designed specifically for frequency analysis of categorical data. It provides the ability to display the frequency of occurrences for different values of a categorical variable. This includes producing frequency counts, which indicate how many times each category appears in the dataset, along with percentages, cumulative frequencies, and other related statistics that summarize the distribution of this categorical data.

While PROC FREQ can provide insights mainly into the distribution of categories, it does not represent data structures or create detailed statistical summaries of numeric values, as other procedures like PROC MEANS or PROC SUMMARY would do. Additionally, while PROC FREQ can display counts of missing values as part of the output, it does not limit its functionality to just these counts; rather, it encompasses a broader analysis of all values within the categorical variables analyzed. Thus, the primary function and strength of PROC FREQ lie in its ability to showcase the frequency of variable occurrences.