If a Researcher Performs a Meta-Analysis and Finds That the Mean

question 17

Multiple Choice

If a researcher performs a meta-analysis and finds that the mean d = 0.45, and the 95 percent confidence interval around this mean is (0.34, 0.56) , what can the researcher conclude?

• A) All future studies of this effect will find effect sizes somewhere between 0.34 and 0.56.
• B) Averaging across all of the literature, there really is no effect.
• C) There is a medium effect, but it is unclear what the direction of the effect is.
• D) Averaging across all of the literature, there is a medium effect, and this effect is statistically significant.

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Definitions:

Economy

The organized system of human activity involved in the production, consumption, and trading of goods and services.

Say's Law

An economic principle that suggests supply creates its own demand, meaning production of goods and services generates the purchasing power needed to buy those goods and services.

Supply

The total amount of a product or service that is available for purchase at any given price in a given market.

Demand

The quantity of a good or service that consumers are willing and able to purchase at various prices during a certain period.