« previous next »

Author Question: You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for ... (Read 58 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?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Aerial photo showing the placement of 24 study plots, each 50 m by 50 m, in the Chihuahuan Desert ne Aerial photo showing the placement of 24 study plots, each 50 m by 50 m, in the Chihuahuan Desert ne
Field research on free-living primates allows primatologists to study patterns of behavior in the se Field research on free-living primates allows primatologists to study patterns of behavior in the se
The Activation-Synthesis Hypothesis of Dreaming The Activation-Synthesis Hypothesis of Dreaming
The Wug Test The Wug Test
Two items from the incomplete-pictures test. H.M.’s memory for the 20 items on the test was ... Two items from the incomplete-pictures test. H.M.’s memory for the 20 items on the test was ...
Step Test for Cardiovascular Endurance. Step Test for Cardiovascular Endurance.
Video: Stomach peristalsis - Movement of Food Through the Small Intestine

For a complete list of videos, visit our video library