An Education Expert Is Researching Teaching Methods and Wishes to Interview

question 23

Multiple Choice

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools. Does this sampling plan result in a random sample? Simple
Random sample? Explain.

• A) No; no. The sample is not random because teachers in small schools are more likely to be selected than teachers in larger schools. It is not a simple random sample because some samples are not possible, such as a sample that includes teachers from schools that were not selected.
• B) Yes; no. The sample is random because all teachers have the same chance of being selected. It is not a simple random sample because some samples are not possible, such as a sample that includes teachers from schools that were not selected.
• C) No; yes. The sample is not random because teachers in small schools are more likely to be selected than teachers in larger schools. It is a simple random sample because all samples have the same chance of being selected.
• D) Yes; yes. The sample is random because all teachers have the same chance of being selected. It is a simple random sample because all samples have the same chance of being selected.

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Definitions:

Capitalism

An economic system where private individuals own capital goods, investments, and means of production, with the goal of making profits.

Market Economy

An economic system where supply and demand from consumers drive the production of goods and services, with minimal government intervention.

Supply And Demand

Basic economic concept that describes the balance between the availability of a product or service and the desire (demand) for it.

Free Enterprise System

An economic system where private businesses operate in competition, largely free of state control, with limited government intervention.