1. Design a questionnaire for collecting data from a sample group.2. supply the rubber mitkrit che bong and mitkrit rubber from other research that is published, no less than 2. 3. preliminary collect information The pain and the hurt and the data size in proportion to the group. For example the number of 180 people.4. analysis of data obtained from 35. experiment with mitkrit rubber collected, based on the number of samples, using 2 30 people.6. data analysis based on 5
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