Final answer:
Option D is correct for finding the average service years of staff members who received leadership training by summing up service years and dividing by the number of trained staff.
Step-by-step explanation:
To determine the average number of service years of staff members who have participated in leadership training using a COUNTIF function and structured references, you must count only those staff members who have received training and then calculate the average service years of just that subset. The correct answer is D. =SUM(ServiceYears) / COUNTIF(Training, "Yes"). This formula sums the service years for all employees and divides it by the number of employees who have participated in leadership training. This will provide the average service years for only those who have received leadership training.
To determine the average number of service years of staff members who have participated in leadership training, you can use the COUNTIF function along with structured references. The correct formula would be option D: =SUM(ServiceYears) / COUNTIF(Training, "Yes"). This formula will sum up the service years of staff members who have participated in leadership training, and then divide it by the count of staff members who have participated in leadership training.