Use the Following Information to Answer the Question

question 53

Multiple Choice

Use the following information to answer the question. Which treatment is most effective at treating carpet stains: vinegar, ammonia, or hydrogen peroxide? In a study, researchers randomly assigned 55 carpet samples with identical stains to one of three groups. Depending on which group they were assigned to, each carpet sample received a home remedy of water mixed with vinegar, ammonia, or hydrogen peroxide. Afterwards, each carpet sample was examined and any remaining stain was measured. Researchers found that a vinegar and water mixture produced better results than both ammonia and hydrogen peroxide.
-Was this a controlled experiment or an observational study?

• A)Observational Study
• B)Controlled Experiment

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Definitions:

Imperfect Price Signals

Situations in markets where prices do not fully reflect all available information, leading to inefficiencies in allocation of resources.

Political Pressure

The use of influence, persuasion, or coercion by individuals or groups to affect governmental decision-making or policy outcomes.

Environmental Problems

Issues affecting the natural environment, often due to human activities, that result in negative impacts on ecosystems and human health.

Politically Weak

A condition or state in which an individual, group, or nation lacks political power, influence, or effective control.