EXERCISE 5 Data have been collected for 19 observations of two variables, y and an, in order to run a regression of y on ac. You are given that 8y 2 10, 2::in {1&2 = 180. a. Compute the proportion of the variation in y that can be explained by 2:. [Ana 0.90] b. Compute the standard error of the estimate (85). [Ans 3.25]