We are planning to check reliability of a translated version of an english Questionnaire.. So, confused about deciding size odsample..
The number of sample include in the survey is depends on the topic you are selecting.
The number of sample also depends on reduce the amount of errors in the survey results. Large number of participants will give you reduction of errors. So always go fro the participants more than 100. (least part)
Dear @Dhara, the sample size when conducting a Survey should be as large as possible, and thus, it depends on the budget of the survey.
Budget is not an issue..
To determine sample size population mean and sd of that perticular condition is require which is unavailable..
So we are wondering whether 400 would be ook..
To check reliability of a translated version of an English Questionnaire, is a pilot sample....
1. How much time you have at disposal.
2. If time available is less, then method of hastening the process needs to be worked out, accordingly the mode of study would vary....
3. take random sample of 10% of the population to be studied for a better reliability score..
sample size depends upon the problem u r dealing with. hw ever add 20% loss in followup in your sample size
You can check this site
http://www.surveysystem.com/sscalc.htm
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