Explain the difference between nodup and nodupkey options?
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How would you create a data set with 1 observation and 30 variables from a data set with 30 observations and 1 variable?
what are the advantages of using SAS in clinical data mangement? why should not we use other software products in managing clinical data?
If you need the value of a variable rather than the variable itself what would you use to load the value to a macro variable?
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Name statements that function at both compile and execution time.
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What is the pound sign used for the DATA _NULL_?
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Do you need to compute new variables? If so,should you do this before you execute the report-writing procedure?
what is the difference between proc means and proc tabulate?
what is the difference between SET and MERGE?