Name: 2Q 2021 (Chs. 7, 10, 11) and complete (d) Does profmarg have a statistically significant effect on rdintens? 4. An intern working for you turns in the following: y = 5+ 2x, n = 102 E(yi - y)? = 10 sit E(xi - 1) 2 =32 SST Eu? =8 SGk (a) What is the R2? (b) What is the standard error of the regression, o? 7 (c) What is the standard error of B,? 100 5. Consider the following: y = 20, x = 10, n =22 E(yi - y)2 = 100 E(xi - x)2 =60 E(xi - I) (yi - y) = 30 R2 = 0.50 (a) Compute Bo and B1. (b) Test the hypothesis that B1 = 1. Use the 5% level of significance