I hope that Q & A can help you ,,,
What should be the sample size for a qualitative research and which type of questionnaire design will be suitable ?
https://www.researchgate.net/post/What_should_be_the_sample_size_for_a_qualitative_research_and_which_type_of_questionnaire_design_will_be_suitable
By "single group" do you mean that all 25 items are intended to measure the same construct? If so, that would be highly redundant.
You can use raosoft website -http: //www.raosoft.com/samplesize.html
You can use the table of Krejcie and Morgan (1970), G*power software technique, or "Rule ten" that initiated by Chin and Newsted (1999) which help you to multiply your number of items by 10; as mentioned in references below;
1- Krejcie, Robert V., and Daryle W. Morgan. "Determining sample size for research activities." Educational and psychological measurement 30.3 (1970): 607-610.
2- Ringle, C., Da Silva, D., & Bido, D. (2015). Structural equation modeling with the SmartPLS.
You can choose between different methods to calculate the minimum sample size requirements. You can find it all in details in the following source, page 18.
Hair, J. F. et al. (2016) A primer on partial least squares structural equation modeling (PLS-SEM). 2nd editio, SAGE Publications Inc. 2nd editio. Sage Publications.
- Badges
- Science topic
- Similar topics
- Mathematics
- Statistics
- Sampling Design
- Sample Size