Q5.(15%) In simple linear regression, show that the test statistic6176604b3c4cd.jpg for  fortesting ρ=0, testing p = 0 is equivalent to the test statistic617660ae86d1a.jpg for testing β1=0，where b1 is the least square estimate of β1, r is the sample correlation coefficient and6176612a3a086.jpg is the estimated standard error of b1.