Hi, This is the log: 1 OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK; 61 62 PROC REG data=Smoking; 63 MODEL Pressure = Smoker; ERROR: Variable PRESSURE not found. NOTE: The previous statement has been deleted. 64 RUN; WARNING: No variables specified for an SSCP matrix. Execution terminating. NOTE: PROCEDURE REG used (Total process time): real time 0.00 seconds CPU time 0.00 seconds 65 QUIT; 66 67 68 OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK; 81 I have attached my data set here. Thanks.
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