The sales director noticed that sales in the Midwest and Northeast regions were not as expected. Additional field training is necessary for the sales representatives in these regions. After conducting a one-month training program, the sales director wants to determine the effectiveness of the training. After all, the company invested a significant amount of money in this program! So the sales director collects the sales data for the first month after the training. The sales director wants to compare the number of orders secured by those who attended the training program and those who didn't attend. This study will help the company to determine the effectiveness of the training. Part A What type of study is the sales director conducting—a survey, an observational study, or an experiment? Justify your answer.