Author Question: You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for ... (Read 49 times)

cnetterville

  • Hero Member
  • *****
  • Posts: 547
You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for independent means at the .05 significance level.
 
  If you are predicting a large effect size, how many participants would you need in total (assuming equal Ns per group) to obtain 80 power?
  A) 20
  B) 26
  C) 40
  D) 52

Question 2

You plan to conduct a study where your directional hypothesis will be assessed with a t test for independent means at the .05 significance level.
 
  Assuming that you will recruit 50 participants per group and predict a small effect size, how much power will your study have?
  A) .17
  B) .26
  C) .29
  D) .41



sokh

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

D

Answer to Question 2

B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

For a complete list of videos, visit our video library