The number of people who have come from a specific selection of classroom. Researchers who conducted experiments by asapda posted on 5 days per 20 minutes per day, including a trial period of 8 weeks.
No. 20, which came from a select sampling of one classroom, the researcher who carried out the experiment on their own. By commuting into the five days a week, 20 minutes per day for a total period of 8 weeks.
The 20 people, which is derived from the random number 1 classroom research is operated manually by the experimental test ลงอ 5 days a week A 20 minutes total time in the experiment 8 week.