In a study of recall memory three different questionnaires (A, B, C) were administered to nine subjects at three different times three months apart about the number of trips to a shopping center during the preceding three months. Each time a different questionnaire was used and the order of the assignments of questionnaires for each subject was randomized.

(a) Is this study experimental, observational, or mixed? Why?

(b) Identify all factor(s), factor levels, and factor-level combinations.

(c) What type of study design is it?

(d) What is the basic unit of study?

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Solution a Is this study experimental observational or mixed Why Ans This stud... View the full answer