A Researcher Reports That the Effectiveness of a New Marketing $\eta$

question 80

Multiple Choice

A researcher reports that the effectiveness of a new marketing campaign significantly increased sales compared with the previous campaign strategy,t(49) = 2.562,p < .05.Use $\eta$ ² to interpret the effect size for this result.

• A) 12% of the variability in marketing effectiveness can be accounted for by the new marketing strategy.
• B) 12% of the standard error can be accounted for by the effectiveness of the marketing strategy.
• C) Marketing effectiveness shifted 0.12 standard deviations above the mean in the population.
• D) 12% of the variability in marketing effectiveness can be accounted for by the new marketing strategy and 12% of the standard error can be accounted for by the effectiveness of the marketing strategy.

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Definitions:

False Consensus Effect

A psychological bias where individuals believe their own viewpoints, actions, and behaviors are more common in the general population than they actually are.

Actors

Individuals who perform in stage plays, movies, television shows, or other productions, portraying characters.

Observers

Individuals who watch or notice something without directly participating in the action.

Private Thoughts

Thoughts that are not expressed verbally or shared with others, often personal or reflective in nature.