base考试95题第84题求解答

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How many variables/observations will come from the below program? data work.roth_ira; start = 1000; do year = 1 to 30; savings + 5000; do month = 1 to 12; int = savings * (.05/12); savings + int; end; output;
end; run;
a) 4 variables, 12 observations
b) 4 variables, 30 observations
c) 5 variables, 12 observations
d) 5 variables, 30 observations

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关键词：Base考试 Base 求解答 observations observation savings start

5 variable: start\year\saving\month\int
30 obs: year=1-30

变量个数在编译时候就确定了，obs取决于output位置