A Regression Model Relating a Dependent Variable, Y, with One

question 40

Short Answer

A regression model relating a dependent variable, y, with one independent variable, x₁, resulted in an SSE of 400. Another regression model with the same dependent variable, y, and two independent variables, x₁ (used in the first model) and x₂ (added in the second model), resulted in an SSE of 320. At α = .05, determine if x₂ contributed significantly to the model. The sample size for both models was 20.

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Definitions:

Positive Reinforcer

An incentive that, when introduced following an action, enhances the probability of that action occurring again.

Behavior Modification

A systematic approach to changing behavior through the application of the principles of conditioning, including both reinforcement and punishment.

Time-Outs

A disciplinary technique used to remove a child from an environment where inappropriate behavior has occurred, to encourage reflection and calm down.

Successive Approximations

A method used in conditioning and learning in which behaviors are broken down into simpler steps and rewarded progressively as they become closer to the desired behavior.