The company tested six training programs to determine which was the most effective. Employees were selected at random without replacement to participate in one of the six programs. Each employee took a pretest to establish their individual baselines. They took a post$-$test to measure the amount of improvement resulting from the training. The increase in test scores for each employee in each training program is provided below. Widgets International, Inc. Customer Service Training Program Results Data Average Increase is Customer Service Rating n $=46$