A survey can take anywhere from a few days to about 75 days depending on the complexity. Simplicity of Language. Questions should be clearly and easily understood. These terms mean different things to different people. High Level of Confidence.
Confidence levels are dependent upon the number of people surveyed.
A Carefully Chosen Sample. Choose the right mix of people from your client list. Samples can be selected at random, by cross section, stratified according to specific criteria etc. 5. Selecting the Most Appropriate Question Format. Deciding what kind of questions to use is an essential part of the questionnaire design process.