Correlating the Scores of 50 Students on Two Tests, an Investigator

question 26

Multiple Choice

Correlating the scores of 50 students on two tests, an investigator found that the sum of the z-score cross-products was 20.The Pearson's product moment coefficient in this case is:

• A) impossible to compute with the information given.
• B) .02.
• C) .20.
• D) .40.
• E) None of these are true.

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Definitions:

Mathematical Modeling

The process of creating a mathematical representation of a real-world situation or system to analyze and predict its behavior.

Lead Time

In purchasing systems, the time between recognition of the need for an order and receiving it; in production systems, it is the order, wait, move, queue, setup, and run times for each component.

Inexpensive

Having a low cost or price; not expensive.

Mathematical Model

A representation of a system, process, or relationship using mathematical concepts and language, often used to analyze or predict behavior.