ABSTRACT
Four groups of subjects took part in a medical experiment: a normal control group (n = 8), a group of diabetic patients without complications (n = 6), a diabetic group with hypertension (n = 7), and a diabetic group with postural hypotension (n = 6). The subjects performed a small physical task at time 0 and two variables were recorded at times −30,−1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15 (minutes). The raw data for variable 1 are given in Table 2.1, which contains several missing values coded as −9⋅0. Plots for the separate groups appear in Fig. 2.1 where the points at −30 minutes are positioned at −5 for convenience. It can be seen that at least two subjects (one in Group 2 and one in Group 3) eventually outstrip their fellows by a handsome margin. Effect of a physical task on hospital patients
Time (minutes)
Subject
−30
−1
1
2
3
4
5
6
8
10
12
15
Group 1
1
4.1
6.1
7.6
7.5
8.9
9.5
8.7
8.8
−9.0
7.0
−9.0
6.5
2
5.8
7.5
10.1
10.4
10.4
8.9
8.9
8.4
9.9
8.6
−9.0
6.9
3
7.0
8.4
11.2
12.8
10.0
10.3
9.5
9.2
9.0
9.4
−9.0
8.4
4
9.0
7.8
10.8
10.3
9.3
10.3
11.5
12.3
10.0
11.4
−9.0
5.9
5
3.6
4.3
3.9
3.9
4.5
3.2
4.1
4.0
3.5
3.7
3.0
2.8
6
7.7
7.0
6.7
7.0
7.9
7.4
7.3
7.2
6.6
6.6
8.3
7.9
7
3.4
2.1
2.2
2.0
2.2
2.2
2.5
2.3
2.5
2.4
2.0
2.2
8
1.8
1.4
2.1
2.4
2.5
2.3
2.0
2.0
1.9
2.0
2.0
1.4
Group 2
9
7.6
8.9
8.5
8.4
8.5
8.2
5.6
8.8
8.8
8.4
8.0
8.2
10
4.2
6.5
7.5
7.1
7.2
7.0
5.0
4.2
6.9
9.5
−9.0
−9.0
11
6.9
13.3
12.9
13.5
13.4
13.1
13.6
13.1
14.8
15.3
16.1
16.9
12
8.1
7.4
8.8
9.2
8.4
9.2
7.9
7.9
7.9
7.3
−9.0
7.2
13
4.5
4.9
5.5
5.6
5.2
5.3
6.4
6.0
6.4
6.4
−9.0
6.9
14
4.2
3.2
3.2
4.0
3.2
3.4
3.4
3.2
3.2
3.2
2.8
2.8
Group 3
15
5.9
5.5
5.5
5.5
5.3
5.0
4.5
4.1
4.3
3.9
3.7
3.5
16
−9.0
0.8
0.4
0.6
0.4
0.4
0.5
0.6
0.5
0.5
0.8
0.7
17
10.1
6.5
6.2
6.3
6.6
5.9
6.5
5.5
5.7
5.1
4.4
4.9
18
5.7
4.3
4.6
3.8
3.9
3.6
3.0
3.7
3.2
3.1
2.7
2.4
19
2.1
2.9
3.2
3.2
2.7
2.7
2.4
2.2
1.8
1.7
1.7
1.5
20
5.5
11.1
10.8
8.7
9.3
10.5
12.7
11.3
19.1
18.9
37.0
39.0
21
0.9
4.9
5.7
7.0
7.0
5.8
6.9
7.7
7.5
8.8
8.1
9.9
Group 4
22
5.0
5.2
3.4
3.0
3.1
3.6
3.2
2.6
4.6
3.8
4.9
2.7
23
4.2
4.3
4.1
3.5
2.8
2.8
4.7
3.7
3.7
4.2
−9.0
4.4
24
3.2
3.0
3.3
3.5
3.4
3.3
3.3
3.3
3.4
3.2
3.1
3.2
25
5.0
6.9
7.5
5.9
−9.0
7.7
7.3
7.6
7.5
7.5
7.0
7.5
26
2.5
12.0
12.2
11.4
11.6
11.7
12.6
10.1
11.4
12.8
11.5
10.7
27
1.6
1.6
2.1
1.9
1.7
2.5
1.6
1.3
3.5
0.6
−9.0
−9.0
