Standard errors are in parentheses. Suppose the following estimated equation. Y = 3638.25 - (1143):. - 11.13x2 + 2.20m n = 250 R2 = 0.465 {112.23} (0.017) [5.38) [1.45) Dropping X2 and X3 from the equation gives: Y = 3585.38 - 0.151X1 R2 = 0.450 [38.91) (0.017) You are to test if the variables of X2 and X3 are jointly significant in the model. Compute the test statistic. Enter the correct answer in the blank box below. If a decimal point appears, round it to two decimal places