This problem is a paired t-test. First, input the data. There are two, numeric variables. You can call them anything you want. I called them CHOL1 and CHOL2.

DATA prob718;

INPUT chol1 chol2;

DATALINES;

210 215

230 240

190 190

215 200

260 280

200 210

;

PROC TTEST DATA = prob718;

PAIRED chol2*chol1;

RUN;

After entering the data, I did a t-test procedure. The PAIRED statement tells which variables to compare and will test if "CHOL2 - CHOL1 = 0".