A Researcher Plans to Use a Matched Groups Design to Assess

question 54

Multiple Choice

A researcher plans to use a matched groups design to assess a treatment for increasing body weight of premature infants.The independent variable has two conditions,treatment and control.Eight pairs of premature infants are matched according to their body weight prior to manipulating the independent variable.In order to control for other potentially relevant characteristics of the participants,the researcher should

• A) identify a matching variable uncorrelated with body weight.
• B) assign the lower weight infant in each pair to the treatment condition.
• C) randomly assign infants in each pair to the treatment or control group.
• D) none of these

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Definitions:

Pure Monopolist

A single seller in a market that produces a unique product or service without close substitutes, controlling the entire supply.

Fair Return

A profit level that allows a business to maintain its operations and justify the risk of investment, often considered in regulatory contexts.

Regulatory Commission

A government body responsible for setting and enforcing rules and regulations in a specific sector to protect public interest.

Economies of Scale

The advantages in cost that companies receive owing to their operational magnitude, with the expense per produced unit generally diminishing as the scale of operations broadens.