SAS Lesson 5: Data Analysis Quiz

PROC PRINT Titles

• Titles in PROC PRINT are affected by subsequent title statements.
• Final output will display "The Top Line" for all PROC PRINT runs once it’s defined.
• The last title affects only the PROC PRINT that follows it.

Macro Variable Substitution

• Use & symbol to reference macro variables in footnotes.
• The correct syntax for substituting the Year variable is: footnote "&year Sales";

DATA Step and Labels

• Labels assigned in a DATA step appear in PROC PRINT and PROC MEANS reports.
• The label for BatAvg will be visible in PROC MEANS when it is assigned in the DATA step.

BY Statement Functionality

• The BY statement organizes output by specified columns but does not sort data.
• Multiple columns can be used in a BY statement for grouping.

FREQ Procedure Misconceptions

• The NOPROCTITLE option does not exist as described and cannot be used to hide the title in PROC FREQ.
• ORDER=FREQ, PLOTS=, and OUT= options are valid and functional within PROC FREQ.

PROC FREQ for Variable Levels

• The PROC FREQ step that includes nlevels generates a summary of variable levels for specified columns.
• Syntax: proc freq data=sashelp.shoes nlevels; tables Region / nocum; run;

PROC FREQ Output Structure

• Specific PROC FREQ steps can generate cross-tabulated data, summarizing frequencies and percentages for selected variables.
• Example output includes frequencies of 'SUV' and 'Sedan' types across cylinder counts.

MEANS Procedure Insights

• The WAYS statement defines combinations of class variables in PROC MEANS but is not commonly updated.
• Output summary from OUT= option does not include automatic columns like COUNT or FREQ.

Input Table Requirements

• Input data for PROC MEANS does not need to be sorted based on CLASS statement variables.
• PROC MEANS can handle unsorted data, automatically managing groupings as specified.

Summary Output Creation in PROC MEANS

• Valid syntax for generating summary tables in PROC MEANS includes the OUT= option.
• Correct examples include: output out=work.summary mean(Weight)=TotW; for summarizing mean values.