Do anyone knows if i have 50 or 100 participants (the sample size) in the questionnaire, how many ones should i choose for the interview with the justification.
I think dr Faten you are talking about response rate ... Here in this Q & A link :-
What's a good response rate in an observational study?
https://www.researchgate.net/post/Whats_a_good_response_rate_in_an_observational_study
Thank you
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