« 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 78 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?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Complementary fit between a macromolecule and a small molecule Complementary fit between a macromolecule and a small molecule
Ankle Reflex Test Ankle Reflex Test
Sublingual drug administration Sublingual drug administration
How to evaluate angles using cosecant, special triangles, and the unit circle (Part 3) How to evaluate angles using cosecant, special triangles, and the unit circle (Part 3)
Diverticula Diverticula are small pouches that can occur along your colon Diverticula Diverticula are small pouches that can occur along your colon
Antineoplastic drug and the cell cycle Antineoplastic drug and the cell cycle
Video: Cerebral Cortex Animation

For a complete list of videos, visit our video library