To assure high validity, reliability, and representativeness of the data, I suggest you survey shoppers in several grocery stores at different times of day and days of the week. Be sure to survey hundreds of people to get a fair sample.
This article should also help you.
http://en.wikipedia.org/wiki/Marketing_research
Define one specific problem it could address through marketing research.
What type of research design do you recommend for addressing that problem, and why?
What is the most appropriate way to collect the data? Justify your choice.
How will you ensure high validity, reliability, and representativeness of the data? ***I need help with this one**
Design an appropriate sampling plan?
** I need help on this one also***
I am doing it on folders coffee.
1 answer