SURVEY DESIGN
Bigger is not always better. The right sample is big enough to trust and small enough to afford.
Three things decide it
Population
How many people are in the group you want to understand?
Margin of error
How close to the truth do you need to be?
Variety
Do your customers differ a lot by age, area or income? More variety needs more people.
The real secret
Who you ask matters more than how many. A small, well-chosen sample beats a large, careless one.
Need the exact number for your study?
Contact us. We will size and design your sample.
Also read: Sample questionnaire · Our books