(Multi stage and Quota Random Sampling), calculated from variables in the sample category 3: 1), Bangkok, 1 and 2) in school district 2 schools per province/territory to a special administrative 3) how much each individual classroom rongrian classroom 2 and 4), the number of students in each classroom is expected to average roughly 40 people per classroom (2 x 2 x 4 x 40) as well as a number of 640 people.
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