Portfolio Stock Portfolio Quarter rate (%) rate (%) Quarter rate (%) Stock rate (%) 1 -2.0 2.7 11 12.3 6.8 2 0.5 3.9 12 16.1 13.0 3 1.3 4.5 13 13.2 11.9 156M 4 5.7 6.0 14 8.8 8.6 10.4 8.7 15 7.9 6.1 3.4 2.7 16 1.1 6.1 7 7.6 3.2 17 3.0 1.0 8 4.1 5.6 18 4.5 7.2 9 5.0 9.2 19 2.7 2.7 10 8.5 11.7 20 7.6 7.6 (a). Let x be the portfolio rate and Y be the stock rate. Examine the plot of the data. Does a simple linear regression model, Y₁ = ẞo + ẞ₁xi + €i, i = 1, . ., 20, seem appropriate? Explain. (b). By hand calculation, fit the simple linear regression model and calculate Bo and B₁. (c). Compute the 20 residuals. hence, calculate SS(Res) and estimate σ². (d). Compute the standard errors of ßo and B₁. (e). Test Ho Bo = 0 and Ha ẞo 0 with the significant level a = = 1%. (f). Produce a 90% confidence interval for ẞ₁.

calculate the percent change in the U.S. national debt from March, 2020 to June, 2020 and compare it to the percent change in the U.S. national debt just before, from December, 2019 to March, 2020, and just after, from June, 2020 to September 2020. Write all your work here.  in billion US dollars (march2020 23,686.87) (June2020 26,477.24)(Sep2020 26,945.39) (December 2019 23,223.81)

Debt ratio 13.93 17.35 16.37 18.15 14.22 11.4 14.77 13.8 16.1 11.58 13 17.57 13.57 11.76 14.32 10.87 13.72 10.13 9.51 18.1 10.26 14.92 9.61 13.5 13.43 9.79 18.92 15.28 13.43 3.09 16.37 17.41 14.66 12.11 10.31 13.95 16.09 13.03 14.22 20.57 13.61 14.89 13.69 17.3 16.39 16.3 9.3 17.06 11.32 9.63 10.19 15.49 14.69 16.09 7.91 12.76 11.66 18.31 16.57 11.69 6.19 19.71 14.67 14.38 17.34 13.68 22.55 17.41 18.03 15.91 8.96 18.05 14.69 16.13 13.2 17.58 16.06 11.23 16.61 12.79 15.69 21.52 27.64 21.27 20.39 25.2 16.36 12.67 13.65 12.89 15.72 15.43 11.12 12.46 9.77 17.26 24.67 15.75 7.61 9.26 12.78 6.59 10.48 13.03 19.15 9.99 19.81 21.02 14.88 12.43 13.23 16.06 9 9.08 13.56 10.46 16.88 23.22 7.99 10.83 13.61 12.01 11.02 24.86 25.79 12.38 20.01 8.09…

Debt ratio 13.93 17.35 16.37 18.15 14.22 11.4 14.77 13.8 16.1 11.58 13 17.57 13.57 11.76 14.32 10.87 13.72 10.13 9.51 18.1 10.26 14.92 9.61 13.5 13.43 9.79 18.92 15.28 13.43 3.09 16.37 17.41 14.66 12.11 10.31 13.95 16.09 13.03 14.22 20.57 13.61 14.89 13.69 17.3 16.39 16.3 9.3 17.06 11.32 9.63 10.19 15.49 14.69 16.09 7.91 12.76 11.66 18.31 16.57 11.69 6.19 19.71 14.67 14.38 17.34 13.68 22.55 17.41 18.03 15.91 8.96 18.05 14.69 16.13 13.2 17.58 16.06 11.23 16.61 12.79 15.69 21.52 27.64 21.27 20.39 25.2 16.36 12.67 13.65 12.89 15.72 15.43 11.12 12.46 9.77 17.26 24.67 15.75 7.61 9.26 12.78 6.59 10.48 13.03 19.15 9.99 19.81 21.02 14.88 12.43 13.23 16.06 9 9.08 13.56 10.46 16.88 23.22 7.99 10.83 13.61 12.01 11.02 24.86 25.79 12.38 20.01 8.09…