Which statistic displayed by PROC MEANS is NOT typically part of the summary?

The statistic that is not typically part of the standard summary provided by PROC MEANS is the variance (VAR). PROC MEANS primarily focuses on key descriptive statistics like the count (N), standard deviation (STD), and maximum (MAX) for a given set of data.

Count represents the number of non-missing observations, which is fundamental for understanding the size of the dataset being analyzed. The standard deviation provides insights into the dispersion of data values, indicating how spread out the values are around the mean. The maximum value indicates the highest observation in the dataset, which is essential for understanding the range of the data.

While variance is a useful statistic in statistical analysis, providing insight into the variability of the data, it is typically not included in the standard output of PROC MEANS unless specifically requested. For users primarily interested in basic summary statistics, the default output focuses on the most common measures, and variance is more commonly computed in other contexts or with additional options. To include variance in the output, one would need to specify it explicitly using the appropriate options within PROC MEANS, which separates it from the typical statistics provided.