The Pearson Correlation Between X₁ and Y Is R =

question 74

Multiple Choice

The Pearson correlation between X₁ and Y is r = 0.40 and SS_Y = 100.When a second variable,X₂,is added to the regression equation,we obtain R² = 0.25.How much additional variability is contributed by adding the second variable as a predictor compared to using X₁ alone?​

• A)​9 points
• B)​15 points
• C)​25 points
• D)​40 points

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Definitions:

Social Reinforcement

A positive or negative feedback from others that influences the likelihood of a behavior's recurrence, enhancing social learning.

Group-Oriented Contingencies

A strategy used within group settings where rewards or consequences are delivered based on collective behavior or performance.

Interdependent

Mutual dependence between things. In social contexts, it refers to relationships where individuals or groups rely on each other.

Preference List

A ranked list of items or options according to a person's likes, desires, or priorities.