Experimental and comparison groups groups. columns 32 people, and to prevent loss of samples and data are incomplete. Researchers add another 10 per cent, for example, so it has a sample of 35 people per group.
The experimental group and the comparison group of 32 people, and to prevent loss of sample. And imperfections of The researchers took samples from 10 percent, so the sample group consisted of 35 students.
Experimental group and the comparison group 32 people and to prevent the loss of data. And imperfect information. The researcher added example% 10 so the group 35 people.