When We Represent Students' Test Performance in Terms of Standard

question 136

Multiple Choice

When we represent students' test performance in terms of standard scores, we must first know the standard deviation of those scores.This statistic tells us:

• A)What the average student's performance was
• B)How close together or far apart the scores are
• C)Whether the test has high predictive validity
• D)Whether the test has high reliability

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Definitions:

Lerner Indices

Measures of a firm’s market power based on the difference between price and marginal cost, normalized by the product's price.

Marginal Cost

The increase or decrease in the total cost incurred by producing one more unit of a good or service.

Lerner Index

A measure of a firm's market power, calculated as the difference between price and marginal cost, normalized by price.

Barrier to Entry

Factors that make it difficult for new firms to enter a market, which can include high startup costs, access to technology, and strict regulations.