Salk Vaccine Field Trial
Randomized Placebo Control Approach의 특징

Randomization
Red |
178 |
44 |
52 |
3 |
277 |
Black |
184 |
45 |
54 |
2 |
285 |
계 |
362 |
89 |
106 |
5 |
562 |
Pearson’s Chi-squared test with simulated p-value (based on 2000 replicates): .
0.002998 |
NA |
1 |
Randomization (%)
64.41 |
15.84 |
18.86 |
0.89 |
100.00 |
Clear Evidence of Vaccine Effects

Treatment vs Control
Red |
19 |
198 |
37 |
23 |
277 |
Black |
14 |
216 |
31 |
24 |
285 |
계 |
33 |
414 |
68 |
47 |
562 |
Polio Rates of 3rd Grades

Control group of NFIP design
Red |
38 |
34 |
45 |
160 |
277 |
Black |
28 |
37 |
52 |
168 |
285 |
계 |
66 |
71 |
97 |
328 |
562 |
Control group of NFIP Design (%)
11.7 |
12.6 |
17.3 |
58.4 |
100.0 |
Cognitive Response Test
야구 방망이와 공세트

집계
Red(10센트 먼저) |
141 |
136 |
277 |
Black(5센트 먼저) |
138 |
147 |
285 |
계 |
279 |
283 |
562 |
Pearson’s Chi-squared test with simulated p-value (based on 2000 replicates): .
0.346 |
NA |
0.6307 |
% 비교.
Red(10센트 먼저) |
50.9 |
49.1 |
100.0 |
Black(5센트 먼저) |
48.4 |
51.6 |
100.0 |
가발 만드는 기계

집계
Red(100분 먼저) |
89 |
188 |
277 |
Black(5분 먼저) |
89 |
196 |
285 |
계 |
178 |
384 |
562 |
Pearson’s Chi-squared test with simulated p-value (based on 2000 replicates): .
0.0528 |
NA |
0.8656 |
% 비교.
Red(100분 먼저) |
32.1 |
67.9 |
100.0 |
Black(5분 먼저) |
31.2 |
68.8 |
100.0 |
호수에 수련

집계
Red(24일 먼저) |
125 |
152 |
277 |
Black(47일 먼저) |
120 |
165 |
285 |
계 |
245 |
317 |
562 |
Pearson’s Chi-squared test with simulated p-value (based on 2000 replicates): .
0.5214 |
NA |
0.4903 |
% 비교.
Red(24일 먼저) |
45.1 |
54.9 |
100.0 |
Black(47일 먼저) |
42.1 |
57.9 |
100.0 |