DATA LIST FREE / depvbl (A8) alln n1 n2 sxsqr1 sxsqr2 meanx1 meanx2 f ssres b1 b01 b2 b02. BEGIN DATA salary 25 10 15 1.44 1.90 2.40 2.99 3.47 970923 122.9 27705.0 1872 18401.6 END DATA. COMPUTE mxsqr1 = meanx1**2. COMPUTE mxsqr2 = meanx2**2. COMPUTE sum1 = (1/sxsqr1) + (1/sxsqr2). COMPUTE sum2 = (meanx1/sxsqr1) + (meanx2/sxsqr2). COMPUTE sum3 = (alln/(n1*n2)) + (mxsqr1/sxsqr1) + (mxsqr2/sxsqr2). COMPUTE sumb1 = b1 - b2. COMPUTE sumb0 = b01 - b02. COMPUTE sumb1sq = sumb1**2. COMPUTE sumb0sq = sumb0**2. COMPUTE a = (((-2*F)/(alln-4))*ssres*sum1) + sumb1sq. COMPUTE b = ((( 2*F)/(alln-4))*ssres*sum2) + (sumb0*sumb1). COMPUTE c = (((-2*F)/(alln-4))*ssres*sum3) + sumb0sq. COMPUTE sqrtb2ac = ((b**2) - (a*c))**.5. COMPUTE xl1 = (-b-sqrtb2ac)/a. COMPUTE xl2 = (-b+sqrtb2ac)/a. SAVE OUTFILE='temp.sav'. LIST / depvbl xl1 xl2. EXECUTE.