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Which example below best describes a longitudinal design in a descriptive research project? A. A panel that consists of households that provide purchasing information at specified intervals over an extended period. B. Surveys involving 600 mall intercepts in six major cities to determine the likes and dislikes of health food. C. A variety of promotional offers would be displayed in stores, with each group of customers seeing only one offer and the resulting brand sales determined. D. None of the above

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Answer:

A. A panel that consists of households that provide purchasing information at specified intervals over an extended period

Explanation:

Longitudinal design in research is a method that involves repeated examination of the same variables over a short or long term to see if there is any changes that occur.

A fixed sample is measured repeatedly to gain information.

A panel that consists of households that provide purchasing information at specified intervals over an extended period, is an example of longitudinal design.

The fixed sample is the panel of households, and they repeatedly provide purchasing information.

So the same sample is measured continuously over a period of time

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