topic Using proc ttest in Statistical Procedures

Using proc ttest

Student_B — Wed, 29 Jul 2015 22:03:59 GMT

Suppose we have variables ID X Y and our data looks like this:

003 42 34

004 54 65

005 33 46

. . .

I want to perform a paired and unpaired t-test on the X and Y variables without a data step (this is part of the question).. I understand

how to do a paired, but how can you do an unpaired t-test, as in X and Y are just different sets of sample data? es

PGStats — Thu, 30 Jul 2015 02:23:37 GMT

Proc Transpose...; by id; var x y; run; ? Then proc ttest...; class _NAME_; var col1; run;

Reeza — Thu, 30 Jul 2015 02:43:26 GMT

You need to transform your data so that you have your variables stacked and a new variable that identifies the groups:

ID Var Value

1 X 1

1 Y 2

1 X 3

1 Y 4