A major drawback of postal surveys is that participants select themselves so control over quota is poor. However, we use a range of follow up techniques to encourage response. This can be especially important when a statistically sound level of response is required from specific sectors.
By taking a general’ rule of thumb’ 10% response for postal surveys, you can calculate how many surveys you need to post out. You can usually achieve a statistically reliable response by obtaining 400 responses with a +/- 5% confidence interval – generally robust enough.
We are able to carry out all elements of a postal survey, questionnaire design and print, stuffing, mailing, return post, data entry and analysis but are happy to provide those elements which complement your in house capabilities.