What options can be used in PROC MEANS to calculate statistics?

The chosen answer highlights the appropriate options that can be utilized in the PROC MEANS procedure to compute fundamental statistics. In particular, the terms indicated—N, MEAN, and STD—are all part of the statistical measures that PROC MEANS can generate.

• N represents the number of non-missing observations for a variable, which is crucial in understanding the size of the dataset being analyzed.

• MEAN provides the average of the observations, a key statistic for central tendency.

• STD stands for standard deviation, which measures the dispersion or variability within the dataset.

These statistics are typically the primary output of PROC MEANS and are essential for summarizing data effectively.

In contrast, other choices may mention related statistical calculations or aggregate functions, but they do not align with the standard statistics produced by PROC MEANS. For instance, while terms like SUM and COUNT can be found in various SAS procedures, they are not used in the same context or format as the measures in the correct option. The focus of PROC MEANS is specifically on summary statistics that help to describe the data's characteristics efficiently.