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In purposive sampling, additional respondents are obtained from initial respondent referrals.
Decline Stage
The stage of the product life cycle characterized by decreases in sales and profits.
Appearance
The way that something looks or seems to the eyes or mind, affecting perceptions and judgments.
Functionality
Describes the range of operations that can be performed by a product, system, or service, especially according to its designed specifications.
Product Line
A group of related products under a single brand sold by the same company.
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