Which of the Following Data Collection Methods Is Not Observational

question 9

Multiple Choice

Which of the following data collection methods is not observational?

• A)A personal interview.
• B)A telephone interview.
• C)A self-administered questionnaire.
• D)An experiment.

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Definitions:

Services

Services, perks, or gratifications available for buying that are inherently immaterial and do not culminate in the possession of anything.

Privately Owned

Refers to assets, businesses, or corporations owned by non-governmental entities or individuals.

Product Line

A collection of interconnected products sold under a unified brand name by the same company.

Product Item

A specific version of a product that has a unique identifier, packaging, price, or quality.