Author Question: The Pearson correlation between X1 and Y is r = 0.50. When a second variable, X2, is added to the ... (Read 33 times)

nummyann

  • Hero Member
  • *****
  • Posts: 576
The Pearson correlation between X1 and Y is r = 0.50. When a second variable, X2, is added to the regression equation, we obtain R2 = 0.60. Adding the second variable increases the variability that is predicted by the regression equation for the Y scores by 36 - 25 = 11.
 
  Indicate whether the statement is true or false

Question 2

A researcher is evaluating a treatment that is expected to increase scores. If a one-tailed test with a = .05 is used, then the critical region consists of z-scores greater than 1.65.
 
  Indicate whether the statement is true or false



brittiany.barnes

  • Sr. Member
  • ****
  • Posts: 321
Answer to Question 1

False

Answer to Question 2

True



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

For a complete list of videos, visit our video library