only answer if you know the answer for sure. only answer Part D

The human resources department at a rm developed a multiple regression to predict the success of candidates for (a) Write down the equation for \"15 multiple regression model. available positions. Drawing records of new hires from ve years ago. analysts regressed current annual salary on age at the time of hire and score on a test given to new hires. The path diagram below summarizes the tted model. Age is ESL Salary = be + 4 A95 + 2 TSSt Score coded in years, the test is scored from 1 to 20, and annual salary is in thousands of dollars ($m). Complete parts a through d. (b) Which is larger: the direct or indirect effect of test score? Age 4 $m/year direct 4 points/ 3 indirect year 2 als/ ' t ye pom s 81 My (0) Find the marginal slope of salary on test score. Test Score 2 sin/point marginal slope = 10 $m/point (d) If you were a new applicant and could take a special course that in a week's time could raise your test score by 6 points, would the course be worth the $24,000 being charged? Which slope is relevant: marginal or partial? O A. It is worth taking ifyou plan on staying 3 years. O B. It is never worth taking the course. O C. It is immediately worth it to take the course. 0 D. It is worth taking if you plan on staying 2 years