Author Question: Why is it important to consider all the independent variables together in one model, rather than in ... (Read 43 times)

tichca

  • Hero Member
  • *****
  • Posts: 554
Why is it important to consider all the independent variables together in one model, rather than in separate simple linear regression models?
 
  What will be an ideal response?

Question 2

A finite population correction factor should be used to adjust the margin of error when the sample taken is larger than ________ of the entire population.
 
  A) 10
  B) 1
  C) 5
  D) 50


jlaineee

  • Sr. Member
  • ****
  • Posts: 380
Answer to Question 1

If an important explanatory variable is not included in the regression model, any conclusions drawn about the effects of other independent variables can be seriously misleading. In particular, adding a relevant variable could well alter the impression of a significant negative association to the conclusion of significant positive association. Further insight can be gained from casual inspection of the data. The only legitimate way to disentangle the separate effects of two or more independent variables on the dependent variable is to model them jointly in a regression equation. Multiple regression models are more accurate than simple linear regression equations when there is more than one relevant independent variable.

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

For a complete list of videos, visit our video library