Data collection by using questionnaire is only available with the target population that read and write only
.The data will be limited only really need only because the data by using query will be questioned the items as possible if the don't understand the question, or understand the question wrong. Or answer some of the questions.It makes data with an error. The researcher can not go back to inquire sample unit, it has the researcher should the questionnaire then comes to reconsider. Times to find defects should be improved.
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การแปล กรุณารอสักครู่..
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