« previous next »

Author Question: You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for ... (Read 42 times)

cnetterville

  • Hero Member
  • *****
  • Posts: 547
on: Jun 20, 2018
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
Reply #1 on: Jun 20, 2018
Answer to Question 1

D

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Living in groups and the many eyes hypothesis. Living in groups and the many eyes hypothesis.
Drawer Test Drawer Test
Antibody techniques. (b) An ELISA to test for the presence of herpes simplex virus (HSV Antibody techniques. (b) An ELISA to test for the presence of herpes simplex virus (HSV
Citrate synthase test Citrate synthase test
U.S. Study on Identity Achievement With age, more young people are classified in identity achieveme U.S. Study on Identity Achievement With age, more young people are classified in identity achieveme
If the gauge reading is now much higher than the first test results, then the cause of the low ... If the gauge reading is now much higher than the first test results, then the cause of the low ...
Video: Knee Animation

For a complete list of videos, visit our video library