Concept explainers
Suppose we are asked to construct a list of treatment assignments for patients entering a study comparing different treatments for duodenal ulcer.
Anticipating that 20 patients will be entered in the study and two treatments will be used, construct a list of random-treatment assignments starting in the 28th row of the random-number table (Table 4 in the Appendix).
Find the list of random-treatment assignments using random-number table.
Explanation of Solution
Consider the treatment A and treatment B.
If the random digit is 0 to 4, then the patients are assigned to treatment A.
If the random digit is 5 to 9, then the patients are assigned to treatment B.
The treatment assignments by using 28th row in the random number table are given below:
Patient number | Random digit | Treatment assignment |
1 | 6 | B |
2 | 9 | B |
3 | 6 | B |
4 | 4 | A |
5 | 4 | A |
6 | 3 | A |
7 | 7 | B |
8 | 1 | A |
9 | 9 | B |
10 | 8 | B |
11 | 0 | A |
12 | 0 | A |
13 | 0 | A |
14 | 2 | A |
15 | 8 | B |
16 | 9 | B |
17 | 8 | B |
18 | 1 | A |
19 | 9 | B |
20 | 5 | B |
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Chapter 6 Solutions
EBK FUNDAMENTALS OF BIOSTATISTICS
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