Question

Use in R

case1102$ratio <- with(case1102,Brain/Liver)

SAS code

data case1102;

set case1102;

ratio=Brain/Liver;

run;

1. Create a plot of the logarithm of the ratio of brain to liver antibodies

against the sacrfice time, using different colors to code the treatment

categories. Comment on the relationship between the response and

the design variables.

Brain 41081	Liver 1456164	Time 0.5	Treatment BD	Day 10	Sex Female	Weight 239	Loss 5.9	Tumor 221
44286	1602171	0.5	BD	10	Female	225	4.0	246
102926	1601936	0.5	BD	10	Female	224	-4.9	61
25927	1776411	0.5	BD	10	Female	184	9.8	168
42643	1351184	0.5	BD	10	Female	250	6.0	164
31342	1790863	0.5	NS	10	Female	196	7.7	260
22815	1633386	0.5	NS	10	Female	200	0.5	27
16629	1618757	0.5	NS	10	Female	273	4.0	308
22315	1567602	0.5	NS	10	Female	216	2.8	93
77961	1060057	3.0	BD	10	Female	267	2.6	73
73178	715581	3.0	BD	10	Female	263	1.1	25
76167	620145	3.0	BD	10	Female	228	0.0	133
123730	1068423	3.0	BD	9	Female	261	3.4	203
25569	721436	3.0	NS	9	Female	253	5.9	159
33803	1019352	3.0	NS	10	Female	234	0.1	264
24512	667785	3.0	NS	10	Female	238	0.8	34
50545	961097	3.0	NS	9	Female	230	7.0	146
50690	1220677	3.0	NS	10	Female	207	1.5	212
84616	48815	24.0	BD	10	Female	254	3.9	155
55153	16885	24.0	BD	10	Male	256	-4.7	190
48829	22395	24.0	BD	10	Male	247	-2.8	101
89454	83504	24.0	BD	11	Female	198	4.2	214
37928	20323	24.0	NS	10	Female	237	2.5	224
12816	15985	24.0	NS	10	Male	293	3.1	151
23734	25895	24.0	NS	10	Male	288	9.7	285
31097	33224	24.0	NS	11	Female	236	5.9	380
35395	4142	72.0	BD	11	Female	251	4.1	39
18270	2364	72.0	BD	10	Female	223	4.0	153
5625	1979	72.0	BD	10	Male	298	12.8	164
7497	1659	72.0	BD	10	Male	260	7.3	364
6250	928	72.0	NS	10	Male	272	11.0	484
11519	2423	72.0	NS	11	Female	226	2.2	168

Answer 1