A Social Scientist Learns, Upon Analyzing Her Data, That the Correlation

question 10

Multiple Choice

A social scientist learns, upon analyzing her data, that the correlation between a subject's hours of television watched and their score on a test that measures propensity to violence is r = 0.3. One way to use r is to compute the percent of the variation in the violence test score that can be explained by the straight-line relationship between that violence test score and hours of television watched. This percent is about

• A) 30%.
• B) 70%.
• C) 9%.
• D) 21%.
• E) 7%.

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Definitions:

Demand Curve

A graph showing the relationship between the price of a good and the quantity demanded.

Price Elasticity

A measure of responsiveness of the quantity demanded or supplied of a good to a change in its price, indicating how changes in price affect demand or supply levels.

Demand Curve

A graph showing the relationship between the price of a good and the quantity of the good that consumers are willing to buy.

Midpoint Formula

A method used in geometry to find the midpoint or the center point between two points on a line segment.