The document describes an experiment that assigns 15 rats randomly to 3 drug treatments (A, B, C) with 5 rats in each treatment. It uses a random number table to assign the rats by reading the two digit numbers row-wise, with the first 5 numbers going to treatment A, the next 5 to treatment B, and the remaining 5 to treatment C. This ensures the rats are randomly distributed among the 3 drug treatments.

1. 12.18 - Drugs A and B are applied to 5 rats each. Being numbered from 1 to 10, we use the
random number table to assign rats randomly to two treatments.
Refer to Exercise 12.18. Suppose that the experiment involved three drugs, A, B and C, with 5
rats assigned to each. Use the random number table to assign the 15 rats randomly to the three
treatments.
Solution
02
09
04
13
03
Treatment A
-----------------------------
14
05
10
06
15
Treatment B
------------------------------
01
08
07
12
11
Treatment C
From the table I started at the beginning. You may start anywhere. Start reading the two digits
row-wise. If the numbers repeat or exceed 15, go to the next. 098 becomes 9th unit.
The first 5 numbers are assigned to treatment A. The next 5 to B. The remaining 5 numbers are

2. assigned to C.
Source(s):
http://www.for.gov.bc.ca/tasb/legsregs/f