Dear ResearchGate Colleagues,
Is the Stratified Random Sampling method appropriate to distribute the questionnaire, where the study population includes only three ministries in ONE area?
Based on the previous studies;
- Stratified random sampling method has the least bias and offers the most generalization.
- Each element has an equal chance of being selected as a subject from the population.
Dear All,
Thanks for your valuable answers..
Ajit Kumar Roy
Yes, that what I exactly did.. I considered each ministry as strata and then used proportionate SRS..
Yes, that would do. If you distribute equal number of questionnaires to each of the ministries, that is called "proportionate stratified random sampling." And if you distribute unequal number of questionnaires to the ministries, that is called "non-proportionate stratified sampling."
But then, you have only 3 ministries. What are you stratifying? Why not just distribute your questionnaire across the 3 ministries and simply call your sampling method "simple random sampling"?
If you can consider each ministry is a strata which are internally homogeneous and externally heterogeneous,then surely you can
Dear All,
Thanks for your valuable answers..
Ajit Kumar Roy
Yes, that what I exactly did.. I considered each ministry as strata and then used proportionate SRS..
Just to say that if you have only 3 specific ministries you will not be able to generalize to ministrieS in general as you will only have a sample of three. If you have say a 200 respondents in each you will should be able to say something precise about each ministry and about people in general, but not about between ministry variation and what makes them different.
And that is why people nowadays often use a clustered or two stage sample (say 25 people in each of 25 ministries ) - it depends what your focus of interest is; specific ministries ( your 3) or ministries in general. For more on this see
Article Multilevel approaches to modelling contexuality: from nuisan...
http://www.bristol.ac.uk/cmm/learning/multilevel-models/samples.html
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