If you specify a CONTROL statement, PROC SURVEYSELECT sorts the input data set by the CONTROL variables before selecting the sample. If you also specify a STRATA statement, the procedure sorts by ...
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Mark Louie Ramos, Penn State (THE CONVERSATION) Scientific studies, and news coverage ...
(THE CONVERSATION) Scientific studies, and news coverage about them, often declare that a study “controlled” for certain variables. For example, the Washington Post reported on a study of GLP-1 drugs ...
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