Pasting text as pictures makes it very hard to read.
You define table aliases using different two letter abbreviations than the aliases you use in the WHERE clause.
Your ON clause has a typo: It shouldn't be on sc.SIN=ct.SIN, but ON ST.SIN=CT.SIN
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Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
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