Period	P/T	VolA	VolB	VolA-B	MSA	MSB	MSA-B
1	PreTest	43	41	 2	50	50.0	 0.0
2	PreTest	22	23	-1	30	30.0	 0.0
3	PreTest	31	31	 0	40	39.5	 0.5
4	PreTest	17	18	-1	23	24.0	-1.0
5	PreTest	29	25	 4	45	44.0	 1.0
6	PreTest	31	25	 6	39	35.0	 4.0
7	Test	22	22	 0	20	20.0	 0.0
8	Test	21	23	-2	23	26.0	-3.0
9	Test	29	25	 4	33	30.0	 3.0
10	Test	29	32	-3	27	33.0	-6.0
11	Test	46	42	 4	44	43.5	 0.5
12	Test	40	35	 5	32	30.0	 2.0
13	Test	38	29	 9	29	27.0	 2.0
14	Test	53	38	15	38	33.0	 5.0
15	Test	47	34	13	41	38.0	 3.0
16	Test	45	26	19	43	34.0	 9.0
17	Test	65	38	27	55	54.0	 1.0
18	Test	40	47	-7	51	57.0	-6.0