A Researcher Studies the Relationship Between SAT Scores,the Test-Taker's Family

question 14

Multiple Choice

A researcher studies the relationship between SAT scores,the test-taker's family income,and his or her grade point average (GPA) .Data are collected from 24 students.He estimates the following model: SAT = β₀ + β₁ GPA + β₂ Income + ε.The following table summarizes a portion of the regression results. Which of the following is the correct hypotheses for testing the joint significance?

• A) H₀:β₀ = β₂ = 0;H_A: At least β₀ ≠ 0
• B) H₀:β₁ = β₂ = 0;H_A: At least one β_j ≠ 0
• C) H₀:β₀ = β₁ = β₂ = 0;H_A: All β_j ≠ 0
• D) H₀:β₁ = β₂ = 0;H_A: Both β_j ≠ 0

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Definitions:

T-cells

A type of white blood cell that plays a central role in cell-mediated immunity, recognizing and destroying infected cells in the body.

Maturation

The process of development and growth, leading to a fully developed or mature state.

Complement Proteins

Proteins in the blood that help or "complement" the immune system in destroying pathogens.

Plasma Membrane

The biological membrane that separates the interior of all cells from the outside environment, controlling the movement of substances in and out of cells.