A random sample of 12 college baseball players participated in a special weight-training program in an attempt to improve their batting averages. The program lasted for 20 weeks immediately prior to the start of the baseball season. The average number of weight training hours per week and the change in their batting averages from the preceding season are as follows:
18, 102 120, 1002 15.4, -102 112.4, 792
19.2, 502 115, 892 16, 342 18, 302
118, 682 125, 1102 110, 342 15, 102
Plot the data. Does it appear that the weight-training program was successful?