« previous next »

Author Question: Extraneous variables need to be controlled to ensure that the experiment is externally valid. ... (Read 24 times)

Alainaaa8

  • Hero Member
  • *****
  • Posts: 576
on: Jun 29, 2018
Extraneous variables need to be controlled to ensure that the experiment is externally valid.
 
 Indicate whether the statement is true or false

Question 2

A combination of two or more probability sampling techniques is called a(n) _____ sample.
 Fill in the blank(s) with correct word


covalentbond

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jun 29, 2018
Answer to Question 1

F
Controlling extraneous variables will assure researchers of internal validity, not external validity.

Answer to Question 2

multistage area


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

EXAMPLE OF A RANDOMIZED CONTROLLED TRIAL EXAMPLE OF A RANDOMIZED CONTROLLED TRIAL
Landsteiner's experiment demonstrating the exquisite specificity of the immune system. Landsteiner's experiment demonstrating the exquisite specificity of the immune system.
Controlled-Release Antimicrobial Drugs Used in Dentistry Controlled-Release Antimicrobial Drugs Used in Dentistry
Blood pressure is controlled by the cardiovascular and kidney systems Blood pressure is controlled by the cardiovascular and kidney systems
The Experiment at Robbers Cave The Experiment at Robbers Cave
Davis’s U-tube experiment Davis’s U-tube experiment
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library