« previous next »

Author Question: A ____ study is designed to test a new drug or treatment in a small group of people to evaluate its ... (Read 98 times)

eruditmonkey@yahoo.com

  • Hero Member
  • *****
  • Posts: 546
on: Jun 19, 2018
A ____ study is designed to test a new drug or treatment in a small group of people to evaluate its safety, determine a safe dosage range, and identify potential side effects.
 
  a. pilot
 b. Phase I
 c. Phase II
 d. Phase III

Question 2

How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?
 
  What will be an ideal response?


blakcmamba

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jun 19, 2018
Answer to Question 1

b

Answer to Question 2

A t test differs from a z test in that s is not needed to make the calculations and the sample size should be smaller (30 or lower), whereas for a z test s is known and the samples are 30 or greater. The calculations are similar except that with a t test they are based on using s (the estimated standard deviation) rather than s. The z test has set critical values to determine significance and the critical values for the t test vary based on sample size.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

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?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

The cotton-top tamarin (Saguinus oedipus), also known as the Pinche tamarin, is a small New W The cotton-top tamarin (Saguinus oedipus), also known as the Pinche tamarin, is a small New W
Common Oral Lesions/Conditions Associated with HIV Infections and Treatment Guidelines Common Oral Lesions/Conditions Associated with HIV Infections and Treatment Guidelines
Study Force Courses Study Force Courses
The obturator test The obturator test
The Prison Study The Prison Study
Video: Simple Diffusion - Ion transport

For a complete list of videos, visit our video library