aveLSAT := 650: sdLSAT := 80: aveFY := 65: sdFY := 10: r := 0.6: xLSAT := 730: xSU := (xLSAT - aveLSAT)/sdLSAT; ySU := xSU*r; yFY := aveFY + ySU*sdFY; rmsFY := 'sqrt(1-r^2)'*sdFY; evalf(rmsFY,2); LowSU := (61 - 71)/rmsFY; upSU := (81 - 71)/rmsFY;