Given the SAS data set WORK.BP
What is the result?
A.
WORK.HIGHBP has 1 observation
WORK.NORMBP has 1 observation
WORK.INVESTBP has 3 observations
B.
WORK.HIGHBP has 1 observation
WORK.NORMBP has 1 observation
WORK.INVESTBP has 4 observations
C.
WORK.HIGHBP has 1 observation
WORK.NORMBP has 1 observation
WORK.INVESTBP has 2 observations
D.
WORK.HIGHBP has 2 observations
WORK.NORMBP has 2 observations
WORK.INVESTBP has 3 observations
答案是A还是B阿？多谢！
t**i 发帖数: 688
2
B
l**********r 发帖数: 74
3
多谢！能解释一下为什么选b么？
w*******n 发帖数: 469
4
trick, the 'else' is paired with the second 'if' only.
