Three admission test preparation programs are being evaluated. The scores obtained by a sample of 20 people who used the programs provided the following data. Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use = 0.05.

Program A 540 400 490 530 490 610

Program B 450 540 400 410 480 370 550

Program C 600 630 580 490 590 620570