Appendix D-2

Appendix D-2. Statistical difference in weekly gross alpha concentrations measured at Boundary and Distant locations.

		Mann-Whitney U Test^a
Parameter	Week		U	Z	p^b
Gross Alpha
	April 3rd		11	-1.43	0.15
	April 10th		11	-1.42	0.15
	April 17th		13.5	0.72	0.47
	April 24th		20	-0.14	0.88
	May 1st		18	0.43	0.67
	May 8th		14	1.00	0.32
	May 15th		15	-0.86	0.39
	May 22nd		12.5	0.36	0.72
	May 29th		13	-1.14	0.25
	June 5th		18	0.43	0.67
	June 12th		16	-0.24	0.81
	June 19th		17	0.57	0.57
	June 26th		12	-1.29	0.20
Gross Beta
	April 3rd		13.5	-1.41	0.16
	April 10th		8.5	1.79	0.07
	April 17th		12	0.96	0.33
	April 24th		17	0.57	0.57
	May 1st		19	-0.29	0.77
	May 8th		7.5	.93	0.05^c
	May 15th		19	-0.29	0.77
	May 22nd		19	-0.29	0.77
	May 29th		18	-0.43	0.67
	June 5th		15	0.86	0.39
	June 12th		13.5	-0.65	0.51
	June 19th		19	-0.29	0.78
	June 26th		16.5	-0.64	0.52

a. See the Determining Statistical Differences of the Helpful Information section for details on the Mann Whitney U test. b. A ‘p’ value greater than 0.05 signifies no statistical difference between data groups. c. The ‘p’ value is exactly 0.053, which is greater than 0.05.