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:

Total Mass

Refers to the complete or overall mass of an object or collection of objects, representing the quantity of matter they contain.

E. Coli

Escherichia coli, a species of bacteria that resides in the intestines of mammals, including humans; while mostly harmless, some strains can cause serious foodborne illness.

Toxic Chemicals

Substances that can cause harm to humans, animals, or the environment.