Multiple choice technology programming languages

What does the following code do? PROC MEANS DATA= ORGANIZATION(WHERE=(REGION IN('WESTERN','SOUTHERN') and SUBSTR(RATE_SCHEDULE,1,2) = 'E1')) MAXDEC = 0 MEAN SUM NONOBS; VAR TOTREV; CLASS REGION RATE_SCHEDULE; run;

  1. Calculate the mean total revenue classified by REGION and RATE_SCHEDULE, but only for the WESTERN and SOUTHERN REGIONS, and only for those two regions whose values of RATE_SCHEDULE start with the string “E1.”

  2. Displays the number of observations(records), mean and total revenue classified by REGION and RATE_SCHEDULE, for the WESTERN and SOUTHERN REGIONS, and only for those two regions whose values of RATE_SCHEDULE start with the string “E1.”

  3. Calculate the mean total revenue classified by REGION and RATE_SCHEDULE, for all the regions except the WESTERN and SOUTHERN REGIONS, and only for those two regions whose values of RATE_SCHEDULE start with the string “E1.”

  4. Displays the Rate Schedule of the WESTERN and SOUTHERN REGIONS where variable TOTREV is an integer.
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Explanation

The SAS code uses PROC MEANS with statistics MEAN, SUM, and options MAXDEC=0 (no decimal places) and NONOBS (suppressing observation counts). The WHERE clause filters rows to regions 'WESTERN' or 'SOUTHERN' and those starting with 'E1'. Thus, it calculates the mean and sum of total revenue for these specific criteria.

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