To Determine If Sugar-Rich Diets Affect Hyperactivity in Kids, a Researcher

question 309

Multiple Choice

To determine if sugar-rich diets affect hyperactivity in kids, a researcher prepared two daily menus that children would receive for a 30-day period. A high-sugar diet was given to the boys, while the girls had a menu that seemed identical but was not a high-sugar diet. At the end of 30 days, the boys and girls were evaluated to determine their levels of hyperactivity. In this study, the high-sugar diet is the __________.

• A) placebo
• B) independent variable
• C) dependent variable
• D) control group

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Definitions:

Monopolist

An entity, often a single firm, that holds exclusive control over the supply of a particular good or service, setting prices without competition.

Marginal Cost

The increase in cost that arises from producing one additional unit of a good or service.

Competitive Industry

An industry in which numerous producers supply a homogeneous product or service, leading to competition over price and quality.

Marginal Cost

The extra expenditure needed to manufacture one more unit of a good or service.