Dear Mr/ Mrs,

For case study, i have data that Bank A has 80 main branch offices and more than 400 sub-branch offices throughout India with 500 corporate customers and 20 million individual customers.

I want to test the effect of service quality, one of which is determined by data security on customer satisfaction and trust, which in turn will form customer loyalty.

1. Who is the study population?

2. What sampling design / technique that can we use to answer the research problem? Why?

3. What are the strengths and weaknesses of the design / sampling technique?

4. The minimum number of samples that we will use in the research? What method of determining the number of samples?

Thank you very much