Question

An input table must be pre-sorted by the columns listed in the CLASS statement of a PROC MEANS step.

proc means data= ;
var Cholesterol;
class Weight_Status Sex;
run;

a. True
b. False

Answer 1

In SAS, the PROC MEANS procedure does not need the input data to be pre-sorted by the CLASS statement variables. It handles sorting internally as needed. b. False

Step-by-step explanation:

The question pertains to the PROC MEANS statement in SAS, which is a statistical analysis tool used in data analytics. Specifically, the question asks whether an input table must be pre-sorted by the columns listed in the CLASS statement when using PROC MEANS.

The answer is False. PROC MEANS in SAS does not require the input data to be pre-sorted by the classifying variables mentioned in the CLASS statement. The procedure itself handles the sorting process as needed for calculations. Therefore, you can provide an unsorted dataset to PROC MEANS, and it will still produce correct results for the variables and classes defined.