What kind of statistics does PROC UNIVARIATE summarize?

PROC UNIVARIATE is specifically designed to generate descriptive statistics for a single variable in SAS. It provides a comprehensive set of summary statistics, including measures of central tendency (such as mean and median), dispersion (such as standard deviation and interquartile range), and various percentiles. Additionally, PROC UNIVARIATE produces visualizations such as histograms and box plots, which help in understanding the distribution of the variable.

This focus on summarizing a single variable allows users to explore and interpret the data effectively, making it easier to identify outliers and assess normality. In contrast, the other options involve broader statistical concepts that PROC UNIVARIATE does not address, as it does not analyze multiple datasets, perform inferential statistics, or engage in predictive analysis. By concentrating on a single variable, PROC UNIVARIATE provides detailed insights that are fundamental for data analysis.