BIS 524 Chapter 14

Create a Data Set Using One Data Step Whenever Possible
Are two data steps necessary in the following code?

Data Scores;
	Input score1-score10;
	Datalines;
98 89 78 92 88 82 79 89 98 77
92 88 82 79 89 98 77 98 89 78
89 78 92 88 98 82 79 89 98 77
98 89 78 79 89 98 77 92 88 82
;

Data Grades;
	Set Scores;
	Grade = Mean(of Score1-Score10);
run;

Proc Means data=Grades;
	Var Grade;
run;

Here is a more efficient way:

Data Grades;
	Input score1-score10;
	Grade = Mean(of Score1-Score10);
	Datalines;
98 89 78 92 88 82 79 89 98 77
92 88 82 79 89 98 77 98 89 78
89 78 92 88 98 82 79 89 98 77
98 89 78 79 89 98 77 92 88 82
;

Proc Means data=Grades;
	Var Grade;
run;