I suspect that the SF variable contains more than two levels. The SF variable should contain two values that indicate the product version. The UniDun variable contains the measurements. Your data should look like this example:
SF UniDun
1 1.23
1 3.21
1 4.23
1 2.14
...
2 4.53
2 3.43
2 3.61
2 3.87
From the PROC UNIVARIATE output, it looks like your data might look more like this:
SF UniDun
1 1.23
1 3.21
2 4.23
2 2.14
...
12 4.53
12 3.43
13 3.61
13 3.87
You can use PROC FREQ to produce the values of the SF variable:
proc freq data=WORK.IMPORT;
tables SF;
run;
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