Which One of the Following Statistics Can Be Used to Make

question 49

Multiple Choice

Which one of the following statistics can be used to make decisions about retaining or discarding an item based on how well the item discriminates between high- and low-scoring test takers?

• A) item-total correlation
• B) inter-item correlation
• C) difficulty level
• D) discrimination index

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Definitions:

Pollution

The introduction of contaminants into the natural environment that cause adverse change.

Socially Optimal Quantity

The level of production that maximizes societal welfare, often considered at the point where marginal cost equals marginal benefit.

Marginal Social Cost

The total cost to society of producing one additional unit, including both private costs and any external costs.

Marginal Social Benefit

The extra advantage to the community that comes from creating or using an additional unit of a product or service.