–* Sampling plan (sampling unit, sample size, sampling procedure)
– Sample = a segment of the population selected for marketing research to represent the population as a whole
– Sampling unit : who is to be surveyed
– Sample size : how many (people)
– Sampling procedure : how to choose samples from population
– Probability sample
– Non-probability sample
– *Research instruments (questionnaire, mechanical instruments)
– Questionnaire : Question forms : closed-end (yes/no, 1...5, etc), open-end (unstructured, word completion, fill in, story/picture completion, thematic apperception test)
– Mechanical instruments – people meters, supermarket scanners,