Sampling technique

[stuti jalan]

Dear Sir, 

This is with regard to your video on stratified sampling. As mentioned a research can utilise multiple methods. For instance, stratified sampling to divide into stratas and then convenience sampling. 

I want to ask if we are selecting respondents by convenience ultimately, do we still need a sampling frame? 

Stratified is a probability method, wherein first rule is sampling frame. 

Thanks and regards, 

Stuti jalan

[Neeraj Kaushik]

Dear Stuti

Yes, we can use a combination of sampling.

You mentioned to choose stratified sampling to choose strata, this means there are finite strata and you are choosing a few randomly (by lottery method). So, you're correct in your observation that in stratified sampling there has to be finite population and items are selected randomly from therein.  Then within in strata, you are choosing people on our own i.e. Convenience sampling, so here no sampling frame is reqd.

Such combination is generally called as Quota sampling. I've explained the same in https://www.youtube.com/watch?v=ryfCtnlFGPw&list=PLzUJUtTJcj8QUTu-fc3odVazY4-uoR7Is&index=17&t=324s

Best wishes

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