Ken Kostka's experiment re: excluder holes
	Snyder	rank	C____	rank
	5	6	6	1.5
	5	6	6	1.5
	5	6	5	6
	5	6	5	6
	5	6	4	15.5
	4	15.5	4	15.5
	4	15.5	4	15.5
	4	15.5	4	15.5
	4	15.5	4	15.5
	4	15.5	3	24
	4	15.5	3	24
	4	15.5	3	24
	3	24	0	27.5
	3	24	0	27.5
Total	59	186.5	51	219.5
Ave	4.21		3.64
Mann-Whitney test for difference
U =	114.5
U' =	81.5
critical value  = 144; n1 = 14, n2 = 14.  At P<0.05
Therefore, accept the hypothesis that the distributions of the two treatments are the same
and no significant difference exists