Based on this DATA step, how many observations are in the earnings data set? data earnings;Earned=0;do Count=1 to 12;Earned+(Amount+Earned)*(Rate/12);output;end;run;

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BlackTom AI · Accepted Answer

When evaluating a SAS DATA step, the number of observations is driven by the OUTPUT statement and the loop structure.
Option a: 12. The code contains a DO Count = 1 to 12; block, and within that block there is an OUTPUT statement. This guarantees that the dataset will receive one observation per iteration, for a total of 12 observations across the 12 iterations. The assignment Earned=0 happens before the loop begins, but does not change the number of iterations or outputs.
Option b: 0. This would only occur if the loop never executed or if OUTPUT never ran. Here, the DO loop is clearly defined to run from 1 to 12 and OUTPUT is executed inside the loop, so this option conflicts with the program’s structure.
Option c: 1. A single observation would arise only if the loop executed once or if OUTPUT were conditional to a single pass. Since COUNT ranges from 1 to 12 with a single OUTPUT inside, there are multiple iterations and thus more than one observation would be created.
Option d: 6. This would imply exactly half of the 12 iterations produced outputs or some other constraint halved the count. There is no such constraint in the code; the OUTPUT runs every time through the loop.
Option e: 13. An off-by-one guess might occur if one thought the loop includes both endpoints plus an extra count, but the DO statement specifies 1 to 12, which yields exactly 12 iterations, not 13.

Dashboard Quiz 4-SAS

Based on this DATA step, how many observations are in the earnings data set? data earnings;Earned=0;do Count=1 to 12;Earned+(Amount+Earned)*(Rate/12);output;end;run;

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