Solutions Statistics

In the following experiment the researcher was interested in the side effects of radiation therapy o

Question: In the following experiment the researcher was interested in the side effects of radiation therapy on patents suffering cancerous lesions. In particular he was interested in the effect of radiation therapy on Mental dexterity. Each patient was scored (Pre test) on a mental dexterity test prior to treatment. They were again scored on a similar test (Post Test) one month after treatment began.

N1 = 16 were not given radiation and served as controls,

N2 = 19 were given radiation dosage in the range 25-50,

N3 = 18 were given radiation dosage in the range 75-100, and

N4 = 21 were given radiation dosage in the range 125-250.

The data were tabulated below:

Pre test	Post Test	Treat
72	74	Control
58	57	Control
66	74	Control
51	56	Control
30	28	Control
48	40	Control
58	61	Control
51	50	Control
38	40	Control
56	56	Control
68	72	Control
36	38	Control
53	53	Control
65	72	Control
32	24	Control
64	62	Control
58	55	25-50 R
58	57	25-50 R
56	57	25-50 R
73	59	25-50 R
49	42	25-50 R
53	49	25-50 R
28	29	25-50 R
31	43	25-50 R
23	29	25-50 R
61	62	25-50 R
40	37	25-50 R
57	59	25-50 R
38	48	25-50 R
77	79	25-50 R
69	64	25-50 R
72	67	25-50 R
50	46	25-50 R
49	49	25-50 R
51	46	25-50 R
23	16	75-100 R
60	51	75-100 R
54	43	75-100 R
48	40	75-100 R
45	35	75-100 R
37	31	75-100 R
50	48	75-100 R
44	31	75-100 R
39	31	75-100 R
57	46	75-100 R
26	14	75-100 R
50	54	75-100 R
47	41	75-100 R
43	30	75-100 R
41	30	75-100 R
45	44	75-100 R
68	69	75-100 R
62	35	75-100 R
64	51	125-250 R
42	26	125-250 R
52	35	125-250 R
47	27	125-250 R
53	40	125-250 R
65	50	125-250 R
67	46	125-250 R
32	25	125-250 R
77	58	125-250 R
32	24	125-250 R
58	45	125-250 R
46	32	125-250 R
45	30	125-250 R
74	68	125-250 R
41	17	125-250 R
46	29	125-250 R
39	20	125-250 R
61	38	125-250 R
50	33	125-250 R
29	12	125-250 R
72	54	125-250 R
38	23	125-250 R