Question: After a new management took office for ABC Company, the management is more concerned with customer satisfaction than it is with company profits. Suppose a test is carried out to determine whether or not new management styles of ABC have increased average customer satisfaction. To test this claim, a random sample of company clients is polled before an important management decision, and customer satisfaction is measured for this sample on a scale of 1 to 10. Then, some time after the management decision has been made and a new company policy implemented, another sample of clients is polled, and their satisfaction scores are computed (on the same scale). Letting the subscript b denoted "before the new decision" and the subscript a denoted "after the new decision," the results of the surveys are: Using these data, do you believe that customer satisfaction is increased, on the average, after the new management decision and the resulting new company policy?