I have identify only 160 companies are in composites manufacturing sector in the UK. If I want to administer a questionnaire survey, how can I determine the sample size?
The process for determining the best sample size to collect so that you can make a good decision isn’t as complicated as you might think (or remember from your stats classes). Because there is no magic bullet or single number, there are a few things you’ll want to have determined before you start figuring out what your sample size is:
1. Your goals and objectives:2.How precise do you need or want to be? 3. How confident or sure do you want to be in the results?4. What kind of variability are you looking at? 5. Estimate your response rate.