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

question 120

Essay

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 and X2, 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:

Number Scores

Quantitative values assigned to individual items or responses in assessments or tests.

Mode

A measure of central tendency; the most frequent score in a distribution of scores.

College Sophomores

A demographic often used in psychological and educational research, referring to students in their second year of college.

Test Grades

Numerical or letter indicators used to evaluate a student's performance on exams or assessments.