The Amount Spent on Textbooks for the Fall Term Was

question 76

Multiple Choice

The amount spent on textbooks for the fall term was recorded for a sample of five hundred university students. The mean expenditure was calculated to be $500 and the standard deviation of the expenditures was calculated to be $100. Suppose a randomly selected student reported that their textbook expenditure was $700. Calculate the z-score for this student's textbook expenditure.

• A) +2
• B)-2
• C)+3
• D)-3

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Definitions:

Error

A mistake made in thinking or action that leads to incorrect or unintended results.

Negative Correlation

A relationship between two variables in which one variable increases as the other decreases, indicating an inverse association.

Variable Increases

Situations or conditions where a measurable factor or quantity grows in magnitude or intensity.

Test-retest

A method used in psychological testing where the same test is administered to the same subjects at two different points in time to assess consistency.