Suppose a School District Decides to Randomly Test High School

question 245

Multiple Choice

Suppose a school district decides to randomly test high school students for attention deficit
Disorder (ADD) . There are three high schools in the district, each with grades 9-12. The school
Board pools all of the students together and randomly samples 250 students. Is this a simple
Random sample?

• A) No, because we can't guarantee that students from each school in the sample.
• B) No, because we can't guarantee that students from each grade in the sample.
• C) Yes, because the students were chosen at random.
• D) Yes, because they could have chosen any 250 students from the district.
• E) Yes, because each student is equally likely to be chosen.

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Definitions:

Substitution Effect

Change in consumption of a good associated with a change in its price, with the level of utility held constant.

Perfectly Competitive

A market structure characterized by a large number of small sellers and buyers, homogeneous products, and freedom of entry and exit.

Profit Maximizing

A process or strategy used by businesses to determine the best output and pricing levels in order to achieve the highest profit.

Labor

Human effort, both physical and mental, employed in the production of goods and services.