(c) To test whether or not the slope coefficient is statistically different from one

     Let B = true parameter; b = estimator of true parameter

     H₀: B₂ = 1

     H₁: B₂ ≠1

     t = ( B - b ) / Se( b ) = ( 0.714 - 1 ) / 0.045 = -6.36

　
     Conclusion: Since the the computed "absolute value"of  t is much greater than 2,
                       therefore,  reject H₀.