In the example of brand-switching data provided in the textbook (Famous Amos cookies),cross-sectional study analysis provided a less valid conclusion than did the longitudinal data analysis.

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The cross-sectional study only provides a snapshot of one point in time, while the longitudinal data analysis allows for tracking of individual behavior over time, providing a more comprehensive understanding of brand-switching habits.

In the Example of Brand-Switching Data Provided in the Textbook