I know b3 is -1.7 and the SE is 2.1.I am not sure how to understand what equation I am supposed to use in order to derive an answer.

16. 1 p The researchers decided to drop systolic blood pressure from their model, but add an interaction term between sex and insurance type. The results are as follows: y = 55.5+ -1.3x1 + -6.8x2 + -1.7x3 + 17.7x4 + 2.0x5 where x1 = 1 for female (0 for male); X2= 1 for private insurance, 0 for non-private; X3=X1*x2; X4 = 1 for black, X5 = 1 for other racial identity. - The standard error for the slope of the interaction term (X3) is 2.1. Is the (race-adjusted) relationship between wait times and insurance type statistically significantly modified by sex? a. Yes b. No