Hi,
I took the SAS 9.4 Base Certification practice exam. Below are the steps for question 13.
This project will use data set cert.input36. At any time, you may save your program as program36 in cert\programs. Write a SAS program that will clean the data in cert.input36 as follows:
Step 1:
create a temporary data set, cleandata36.
In this data set, convert all group values to upper case.
Then keep only observations with group equal to 'A' or 'B'.
Step 2:
Determine the MEDIAN value for the Kilograms variable for each group (A,B) in the cleandata36 data set. Round MEDIAN to the nearest whole number.
Step 3:
create results.output36 from cleandata36
Ensure that all values for variable Kilograms are between 40 and 200, inclusively.
If the value is missing or out of range, replace the value with the MEDIAN Kilograms value for the respective group (A,B) calculated in step 2.
How many observations are in results.output36?
The original dataset had 5000 observations.
My answer was 4897 observations.
The practice exam has 4992 observations for the answer.
I can't figure out why there is a 95 observation difference.
I did answer the second question regarding the median correctly.
Thanks for your help.
I used the following code:
data cleandata36; set cert.input36; group = upcase(group); where group in ('A' 'B'); run;
proc means data=cleandata36 median maxdec=0; class group; var kilograms; run;
data results.output36; set cleandata36; if Group = 'A' and kilograms lt 40 or kilograms gt 200 then kilograms = 79; if Group = 'B' and kilograms lt 40 or kilograms gt 200 then kilograms = 89; run;
proc means data=results.output36 maxdec= 2 min max mean median n; class group; var kilograms; run;
The answer code is: data work.cleandata36; set cert.input36; group=upcase(group); if group in ('A','B'); run;
proc means data=work.cleandata36 median;
class group;
var kilograms;
run;
data results.output36;
set cleandata36;
if Kilograms < 40 or Kilograms > 200 then do;
if group='A' then kilograms=79;
else kilograms=89;
end;
run;
proc contents data=results.output36;
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