RMB301Xuất hiện trong 3 đề thi
The design of your questionnaire will affect the response rate and the reliability and validity of the data you collect. These, along with response rates, can be maximized by:
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Acareful design of individual questions;
Bclear and pleasing layout of the questionnaire;
Clucid explanation of the purpose of the questionnaire;
Dpilot testing;
Ecarefully planned and executed delivery and return of completed questionnaires
FAll of the above are correct.