Author Question: As part of a study at a large university, data were collected on n = 224 freshmen computer science ... (Read 166 times)

Destiiny22 · **on:** Feb 14, 2020

Question 1

True or False.

The rejection of the null hypothesis in a global F-test means that the model is the best model for providing reliable estimates and predictions.
◦ True
◦ False

Question 2

As part of a study at a large university, data were collected on n = 224 freshmen computer science (CS) majors in a particular year. The researchers were interested in modeling y, a student's grade point average (GPA) after three semesters, as a function of the following independent variables (recorded at the time the students enrolled in the university):

x₁ = average high school grade in mathematics (HSM)
x₂ = average high school grade in science (HSS)
x₃ = average high school grade in English (HSE)
x₄ = SAT mathematics score (SATM)
x₅ = SAT verbal score (SATV)

A first-order model was fit to data.

Give the null hypothesis for testing the overall adequacy of the model.
◦ H₀: β₀ = β₁ = β₂ = β₃ = β₄ = β₅ = 0
◦ H₀: β₁ = 0
◦ H₀: β₁ = β₂ = β₃ = β₄ = β₅ = 0
◦ H₀: β₀ + β₁x₁ + β₂x₂ + β₃x₃ + β₄x₄ + β₅x₅ = 0

jgranad15 · **Reply #1 on:** Feb 14, 2020

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