Hello, I have a question on Ch 13 quiz, number 6 of the SAS Prep Guide SAS 9 4th Edition. Why is the answer not a) instead of c) seems like C) actually has an extra unmatched observation? Can anyone help? Suppose you merge data sets Health.Set1 and Health.Set2 below: Which output does the following program create? data work.merged; merge health.set1( in = in1) health.set2( in = in2); by id; if in1 and in2; run; proc print data = work.merged; run; Institute, SAS. SAS Certification Prep Guide: Base Programming for SAS9, Fourth Edition (Kindle Locations 7517-7521). SAS Institute. Kindle Edition.
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