As a member of a research team investigating the impact of a time-management training program on the efficiency of employees in a technology company, our focus is on evaluating the program's effectiveness by comparing the time taken to complete tasks before and after the training intervention for each employee. In this context, the team meticulously measured the time each employee spent on a designated set of tasks both before and after the training. Now, let's explore the process of making inferences about the mean difference in task completion times. Given the nature of our study, which statistical test would be more appropriate for making inferences about the mean difference in task completion times? Provide reasons supporting your choice.