29. a frequency report of the variable Jobcode in the work.Actors data set is listed below
Jobcode frequency percent cumulative
frequency cumulative
percent
Actor I 2 33.33 2 33.33
Actor II 2 33.33 4 66.67
Actor III 2 33.33 6 100.00
frequency missing=1
The following sas program is submitted:
data work.joblevels;
set work.actors;
if jobcode in ('Actor I', 'Actor II') then
joblevel='Beginner';
if jobcode='Actor III' then
joblevel='Advanced';
else joblevel='Unknown';
run;
Which of the following represents the possible value for the variable joblevel in the work.joblevels data set?
a. Advanced and Unknown only
b. Beginner and Advanced only
c. Beginner, Advanced, and Unknown
d.''(missing character value)
答案选a



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