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楼主
楼主 |
发表于 2009-3-30 10:10:44
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只看该作者
请教两题123的题目
QUESTION 110
The contents of the raw data file EMPLOYEE are listed below:
----|----10---|----20---|----30
Ruth 39 11
Jose 32 22
Sue 30 33
John 40 44
The following SAS program is submitted:
data test;
in file' employee';
input employee_ name $ 1-4;
if employee_ name = 'Ruth' then input idnum 10-11;
else input age 7-8;
run
Which one of the following values does the variable IDNUM contain when the name
of the employee is "Ruth"?
A. 11
B. 22
C. 32
D. . (missing numeric value)
Answer: B
为什么结果是下一个observation的值？
QUESTION 111
A SAS PRINT procedure output of the WORK.LEVELS data set is listed below:
Obsname level
1 Frank 1
2 Joan 2
3 Sui 2
4 Jose 3
5 Burt 4
6 Kelly .
7 Juan 1
The following SAS program is submitted:
data work . expertise;
set work. levels;
if level = . then
expertise = 'Unknown';
else if level = 1 then
expertise = 'Low';
else if level = 2 or 3 then
expertise =' Medium';
else
expertise = 'High';
run;
Which of the following values does the variable EXPERTISE contain?
A. Low, Medium, and High only
B. Low, Medium, and Unknown only
C. Low, Medium, High, and Unknown only
D. Low, Medium, High, Unknown, and ' ' (missing character value)
Answer: B
为什么不出现High？ 那level=4时，expertise是什么？ |
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