Salk Vaccine Field Trial
Randomized Placebo Control Approach의 특징

Randomization
| Red |
268 |
71 |
64 |
14 |
417 |
| Black |
273 |
63 |
76 |
7 |
419 |
| 계 |
541 |
134 |
140 |
21 |
836 |
Pearson’s Chi-squared test with simulated p-value (based on
2000 replicates): .
| 1.453 |
NA |
0.4998 |
Clear Evidence of Vaccine Effects

Treatment vs Control
| Red |
34 |
314 |
52 |
17 |
417 |
| Black |
29 |
308 |
53 |
29 |
419 |
| 계 |
63 |
622 |
105 |
46 |
836 |
Pearson’s Chi-squared test with simulated p-value (based on
2000 replicates): .
| 3.59 |
NA |
0.2849 |
Polio Rates of 3rd Grades

Control group of NFIP design
| Red |
40 |
66 |
54 |
257 |
417 |
| Black |
46 |
46 |
46 |
281 |
419 |
| 계 |
86 |
112 |
100 |
538 |
836 |
Pearson’s Chi-squared test with simulated p-value (based on
2000 replicates): .
| 5.696 |
NA |
0.1449 |
Control group of NFIP Design (%)
| 10.3 |
13.4 |
12.0 |
64.4 |
100.0 |
Cognitive Response Test
야구 방망이와 공세트

집계
| Red(10센트 먼저) |
202 |
215 |
417 |
| Black(5센트 먼저) |
182 |
237 |
419 |
| 계 |
384 |
452 |
836 |
Pearson’s Chi-squared test with simulated p-value (based on
2000 replicates): .
| 2.108 |
NA |
0.1659 |
% 비교.
| Red(10센트 먼저) |
48.4 |
51.6 |
100.0 |
| Black(5센트 먼저) |
43.4 |
56.6 |
100.0 |
가발 만드는 기계

집계
| Red(100분 먼저) |
119 |
298 |
417 |
| Black(5분 먼저) |
125 |
294 |
419 |
| 계 |
244 |
592 |
836 |
Pearson’s Chi-squared test with simulated p-value (based on
2000 replicates): .
| 0.1698 |
NA |
0.6927 |
% 비교.
| Red(100분 먼저) |
28.5 |
71.5 |
100.0 |
| Black(5분 먼저) |
29.8 |
70.2 |
100.0 |
호수에 수련

집계
| Red(24일 먼저) |
183 |
234 |
417 |
| Black(47일 먼저) |
168 |
251 |
419 |
| 계 |
351 |
485 |
836 |
Pearson’s Chi-squared test with simulated p-value (based on
2000 replicates): .
| 1.232 |
NA |
0.2889 |
% 비교.
| Red(24일 먼저) |
43.9 |
56.1 |
100.0 |
| Black(47일 먼저) |
40.1 |
59.9 |
100.0 |