The following SAS program is submitted:
data WORK.TEST;
set WORK.MEASLES(keep=Janpt Febpt Marpt);
array Diff{3} Difcount1-Difcount3;
array Patients{3} Janpt Febpt Marpt;
run;
What new variables are created?
A. Difcount1, Difcount2 and Difcount3
B. Diff1, Diff2 and Diff3
C. Janpt, Febpt, and Marpt
D. Patients1, Patients2 and Patients3
Answer: A
注解：ARRAY statement用于定义Array内的元素。题目中，Janpt, Febpt和Marpt是来自于Measles data set的旧变量，仅有Difcount1, Difcount2和Difcount3是新建立的变量。