It is X~N(mu,sigma^2) ,right ?
DATA CALC;
alpha = 1;
beta1 = 2;
beta2 = -1.5;
call streaminit(1234);
DO i = 1 to 200;
X1=rand('normal',1,2);
X2=rand('normal',3,1);
Noise=rand('normal');
Y=alpha+beta1*X1+beta2*X2+Noise;
OUTPUT;
END;
RUN;
PROC PRINT DATA=CALC;
RUN;
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