This topic contains a solution. Click here to go to the answer

Author Question: As part of a study at a large university, data were collected on n = 224 freshmen computer science ... (Read 150 times)

RRMR

  • Hero Member
  • *****
  • Posts: 557

Question 1

True or False.

The value of R2 is only useful when the number of data points is substantially larger than the number of  β parameters in the model.
◦ 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 with R2 = 0.211.

What is the correct interpretation of R2, the coefficient of determination for the model?
◦ We expect to predict GPA to within approximately .21 of its true value.
◦ Approximately 79% of the sample variation in GPAs can be explained by the first-order model.
◦ We are 79% confident that the model is useful for predicting y.
◦ Approximately 21% of the sample variation in GPAs can be explained by the first-order model.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by RRMR on Feb 14, 2020

brbarasa

  • Sr. Member
  • ****
  • Posts: 308
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly




RRMR

  • Member
  • Posts: 557
Reply 2 on: Feb 14, 2020
Gracias!


sarah_brady415

  • Member
  • Posts: 328
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

For a complete list of videos, visit our video library