=+test the three approaches. Because they believed that educational background may affect the results, they selected 3 employees from each of 10 different college major programs of study (liberal arts, accounting, economics, management, marketing, finance, information systems, computer science, operations, other), and randomly assigned each to one of the three approaches. At the end of training, each participant took an exam. The results are shown here.

Source DF Sum of Squares Mean Square F-ratio P-value Major 9 2239.47 248.830 21.69 60.0001 Training 2 171.47 85.735 7.47 0.004 Error 18 206.53 11.474 Total 29 2617.47