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Administrative Control - Term applied to studies relying on questionnaires and referring to the speed, cost, and control of the replies afforded by the mode of administration.
Aided Question - Question where the respondent receives some prompting, such as a list of product names.
Alternative (scientific) Hypothesis - States there is a change, impact, difference, or relationship between two variables.
Analysis of Variance (ANOVA) - Procedure that tests for significant mean differences in situations where there are three or more categories or treatment conditions, under the assumption that the populations are normally distributed.
Area Sampling - Form of cluster sampling in which areas (neighborhoods, census tracts) serve as the primary sampling units. The population is divided into mutually exclusive and exhaustive areas using maps, and a random sample of areas is selected.