Variable.Variable costs – Futsal sport student's school year 6 school year Chiang Yuen phityakhom 2558 (2015)Variable-sports in the student's Futsal school year 6 school year Chiang Yuen phityakhom 2558 (2015)Specific termsPopulation refers to a group of organisms of the same type in the same area to live. In a time where in each area will have a different number of population. A sample refers to a member of the part of the population and sample the fine, it must be representative of the population by the necessity of using, for example, is there a possibility to store the data. Is economical and effective.
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